Port to lit 2.0

package.json

src/dbp-official-signature-pdf-upload.js

src/dbp-pdf-annotation-view.js

src/dbp-pdf-preview.js

src/dbp-qualified-signature-pdf-upload.js

src/dbp-signature-verification-full.js

src/dbp-signature-verification.js

src/ext-sign-iframe.js

src/styles.js

src/textswitch.js

src/utils.js

vendor/toolkit

yarn.lock