Make sure every package supports eslint and run in CI

toolkit-showcase/src/dbp-person-select-demo-activity.js

-import {css, html, LitElement} from 'lit-element';
+import {css, html} from 'lit-element';
 import {ScopedElementsMixin} from '@open-wc/scoped-elements';
 import {PersonSelectDemo} from '@dbp-toolkit/person-select/src/dbp-person-select-demo';
 import * as commonUtils from '@dbp-toolkit/common/utils';
 import * as commonStyles from '@dbp-toolkit/common/styles';
 import {unsafeHTML} from 'lit-html/directives/unsafe-html.js';
 import readme from '@dbp-toolkit/person-select/README.md';
-import highlightCSSPath from 'highlight.js/styles/default.css';
 import * as demoStyles from "./styles";
 import {AdapterLitElement} from "@dbp-toolkit/provider/src/adapter-lit-element";
 

toolkit-showcase/src/dbp-qr-code-scanner-demo-activity.js

-import {css, html, LitElement} from 'lit-element';
+import {css, html} from 'lit-element';
 import {ScopedElementsMixin} from '@open-wc/scoped-elements';
 import {QrCodeScannerDemo} from '@dbp-toolkit/qr-code-scanner/src/dbp-qr-code-scanner-demo';
 import * as commonUtils from '@dbp-toolkit/common/utils';
 import * as commonStyles from '@dbp-toolkit/common/styles';
 import {unsafeHTML} from 'lit-html/directives/unsafe-html.js';
 import readme from '@dbp-toolkit/qr-code-scanner/README.md';
-import highlightCSSPath from 'highlight.js/styles/default.css';
 import * as demoStyles from './styles';
 import {AdapterLitElement} from "@dbp-toolkit/provider/src/adapter-lit-element";
 

toolkit-showcase/src/styles.js

-import {css, unsafeCSS, CSSResult} from 'lit-element';
+import {css, CSSResult} from 'lit-element';
 
 /**
  * We want to have "neutral" colors here

yarn.lock

@@ -1176,6 +1176,11 @@
     "@types/minimatch" "*"
     "@types/node" "*"
 
+"@types/json-schema@^7.0.3":
+  version "7.0.7"
+  resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.7.tgz#98a993516c859eb0d5c4c8f098317a9ea68db9ad"
+  integrity sha512-cxWFQVseBm6O9Gbw1IWb8r6OS4OhSt3hPZLkFApLjM8TEXROBuQGLAH2i2gZpcXdLBIrpXuTDhH7Vbm1iXmNGA==
+
 "@types/minimatch@*", "@types/minimatch@^3.0.3":
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/@types/minimatch/-/minimatch-3.0.3.tgz#3dca0e3f33b200fc7d1139c0cd96c1268cadfd9d"
@@ -1223,6 +1228,76 @@
   dependencies:
     "@types/node" "*"
 
+"@typescript-eslint/eslint-plugin@^4.22.0":
+  version "4.22.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.22.0.tgz#3d5f29bb59e61a9dba1513d491b059e536e16dbc"
+  integrity sha512-U8SP9VOs275iDXaL08Ln1Fa/wLXfj5aTr/1c0t0j6CdbOnxh+TruXu1p4I0NAvdPBQgoPjHsgKn28mOi0FzfoA==
+  dependencies:
+    "@typescript-eslint/experimental-utils" "4.22.0"
+    "@typescript-eslint/scope-manager" "4.22.0"
+    debug "^4.1.1"
+    functional-red-black-tree "^1.0.1"
+    lodash "^4.17.15"
+    regexpp "^3.0.0"
+    semver "^7.3.2"
+    tsutils "^3.17.1"
+
+"@typescript-eslint/experimental-utils@4.22.0":
+  version "4.22.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-4.22.0.tgz#68765167cca531178e7b650a53456e6e0bef3b1f"
+  integrity sha512-xJXHHl6TuAxB5AWiVrGhvbGL8/hbiCQ8FiWwObO3r0fnvBdrbWEDy1hlvGQOAWc6qsCWuWMKdVWlLAEMpxnddg==
+  dependencies:
+    "@types/json-schema" "^7.0.3"
+    "@typescript-eslint/scope-manager" "4.22.0"
+    "@typescript-eslint/types" "4.22.0"
+    "@typescript-eslint/typescript-estree" "4.22.0"
+    eslint-scope "^5.0.0"
+    eslint-utils "^2.0.0"
+
+"@typescript-eslint/parser@^4.22.0":
+  version "4.22.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-4.22.0.tgz#e1637327fcf796c641fe55f73530e90b16ac8fe8"
+  integrity sha512-z/bGdBJJZJN76nvAY9DkJANYgK3nlRstRRi74WHm3jjgf2I8AglrSY+6l7ogxOmn55YJ6oKZCLLy+6PW70z15Q==
+  dependencies:
+    "@typescript-eslint/scope-manager" "4.22.0"
+    "@typescript-eslint/types" "4.22.0"
+    "@typescript-eslint/typescript-estree" "4.22.0"
+    debug "^4.1.1"
+
+"@typescript-eslint/scope-manager@4.22.0":
+  version "4.22.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-4.22.0.tgz#ed411545e61161a8d702e703a4b7d96ec065b09a"
+  integrity sha512-OcCO7LTdk6ukawUM40wo61WdeoA7NM/zaoq1/2cs13M7GyiF+T4rxuA4xM+6LeHWjWbss7hkGXjFDRcKD4O04Q==
+  dependencies:
+    "@typescript-eslint/types" "4.22.0"
+    "@typescript-eslint/visitor-keys" "4.22.0"
+
+"@typescript-eslint/types@4.22.0":
+  version "4.22.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.22.0.tgz#0ca6fde5b68daf6dba133f30959cc0688c8dd0b6"
+  integrity sha512-sW/BiXmmyMqDPO2kpOhSy2Py5w6KvRRsKZnV0c4+0nr4GIcedJwXAq+RHNK4lLVEZAJYFltnnk1tJSlbeS9lYA==
+
+"@typescript-eslint/typescript-estree@4.22.0":
+  version "4.22.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.22.0.tgz#b5d95d6d366ff3b72f5168c75775a3e46250d05c"
+  integrity sha512-TkIFeu5JEeSs5ze/4NID+PIcVjgoU3cUQUIZnH3Sb1cEn1lBo7StSV5bwPuJQuoxKXlzAObjYTilOEKRuhR5yg==
+  dependencies:
+    "@typescript-eslint/types" "4.22.0"
+    "@typescript-eslint/visitor-keys" "4.22.0"
+    debug "^4.1.1"
+    globby "^11.0.1"
+    is-glob "^4.0.1"
+    semver "^7.3.2"
+    tsutils "^3.17.1"
+
+"@typescript-eslint/visitor-keys@4.22.0":
+  version "4.22.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.22.0.tgz#169dae26d3c122935da7528c839f42a8a42f6e47"
+  integrity sha512-nnMu4F+s4o0sll6cBSsTeVsT4cwxB7zECK3dFxzEjPBii9xLpq4yqqsy/FU5zMfan6G60DKZSCXAa3sHJZrcYw==
+  dependencies:
+    "@typescript-eslint/types" "4.22.0"
+    eslint-visitor-keys "^2.0.0"
+
 "@ungap/promise-all-settled@1.1.2":
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/@ungap/promise-all-settled/-/promise-all-settled-1.1.2.tgz#aa58042711d6e3275dd37dc597e5d31e8c290a44"
@@ -2752,7 +2827,7 @@ eslint-plugin-jsdoc@^32.0.0:
     semver "^7.3.4"
     spdx-expression-parse "^3.0.1"
 
-eslint-scope@^5.1.1:
+eslint-scope@^5.0.0, eslint-scope@^5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-5.1.1.tgz#e786e59a66cb92b3f6c1fb0d508aab174848f48c"
   integrity sha512-2NxwbF/hZ0KpepYN0cNbo+FN6XoK7GaHlQhgx/hIZl6Va0bF45RQOOwhLIy8lQDbuCiadSLCBnH2CFYquit5bw==
@@ -2760,7 +2835,7 @@ eslint-scope@^5.1.1:
     esrecurse "^4.3.0"
     estraverse "^4.1.1"
 
-eslint-utils@^2.1.0:
+eslint-utils@^2.0.0, eslint-utils@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/eslint-utils/-/eslint-utils-2.1.0.tgz#d2de5e03424e707dc10c74068ddedae708741b27"
   integrity sha512-w94dQYoauyvlDc43XnGB8lU3Zt713vNChgt4EWwhXAP2XkBvndfxF0AgIqKOOasjPIPzj9JqgwkwbCYD0/V3Zg==
@@ -3464,6 +3539,18 @@ globby@^10.0.1:
     merge2 "^1.2.3"
     slash "^3.0.0"
 
+globby@^11.0.1:
+  version "11.0.3"
+  resolved "https://registry.yarnpkg.com/globby/-/globby-11.0.3.tgz#9b1f0cb523e171dd1ad8c7b2a9fb4b644b9593cb"
+  integrity sha512-ffdmosjA807y7+lA1NM0jELARVmYul/715xiILEjo3hBLPTcirgQNnXECn5g3mtR8TOLCVbkfua1Hpen25/Xcg==
+  dependencies:
+    array-union "^2.1.0"
+    dir-glob "^3.0.1"
+    fast-glob "^3.1.1"
+    ignore "^5.1.4"
+    merge2 "^1.3.0"
+    slash "^3.0.0"
+
 globby@^11.0.2:
   version "11.0.2"
   resolved "https://registry.yarnpkg.com/globby/-/globby-11.0.2.tgz#1af538b766a3b540ebfb58a32b2e2d5897321d83"
@@ -6029,7 +6116,7 @@ regex-not@^1.0.0, regex-not@^1.0.2:
     extend-shallow "^3.0.2"
     safe-regex "^1.1.0"
 
-regexpp@^3.1.0:
+regexpp@^3.0.0, regexpp@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-3.1.0.tgz#206d0ad0a5648cffbdb8ae46438f3dc51c9f78e2"
   integrity sha512-ZOIzd8yVsQQA7j8GCSlPGXwg5PfmA1mrq0JP4nGhh54LaKN3xdai/vHUDu74pKwV8OxseMS65u2NImosQcSD0Q==
@@ -7069,7 +7156,7 @@ tslib@2.1.0, tslib@^2.1.0:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.1.0.tgz#da60860f1c2ecaa5703ab7d39bc05b6bf988b97a"
   integrity sha512-hcVC3wYEziELGGmEEXue7D75zbwIIVUMWAVbHItGPx0ziyXxrOMQx4rQEVEV45Ut/1IotuEvwqPopzIOkDMf0A==
 
-tslib@^1.9.0, tslib@^1.9.3:
+tslib@^1.8.1, tslib@^1.9.0, tslib@^1.9.3:
   version "1.14.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.14.1.tgz#cf2d38bdc34a134bcaf1091c41f6619e2f672d00"
   integrity sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==
@@ -7079,6 +7166,13 @@ tslib@^2.0.3:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.0.3.tgz#8e0741ac45fc0c226e58a17bfc3e64b9bc6ca61c"
   integrity sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ==
 
+tsutils@^3.17.1:
+  version "3.21.0"
+  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.21.0.tgz#b48717d394cea6c1e096983eed58e9d61715b623"
+  integrity sha512-mHKK3iUXL+3UF6xL5k0PEhKRUBKPBCv/+RkEOpjRWxxx27KKRBmmA60A9pgOUvMi8GKhRMPEmjBRPzs2W7O1OA==
+  dependencies:
+    tslib "^1.8.1"
+
 tunnel-agent@^0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz#27a5dea06b36b04a0a9966774b290868f0fc40fd"