Update dependency selfsigned to v2

This MR contains the following updates:

Package	Type	Update	Change
selfsigned	devDependencies	major	^1.10.7 -> ^2.0.0

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Release Notes

jfromaniello/selfsigned

v2.0.0

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Configuration

Schedule: "every weekend" (UTC).

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This MR has been generated by Renovate Bot.

added renovate label

mentioned in issue #60

changed the description

added 5 commits

• 4f7c15a0...d43035ae - 4 commits from branch master
• 73dbc051 - Update dependency selfsigned to v2

Compare with previous version

mentioned in commit 0bedd1fb

merged