feat: Alerts for new ui5lint version in console

[d3xter666]

This PR enables notifications in the console when there is a new version of the ui5linter.

[d3xter666]

The build is failing because of missing coverage for the newly introduced code of the notifier: https://github.com/SAP/ui5-linter/pull/57/files#diff-fa8d4e24d8399e8350f1c8bad05df53e8032ea995835bf911507015e2db61cddR25

However, it's clear that this is untestable code in terms of unit testing. In ui5-tooling/cli this is covered by the integration tests which we're unable to do here (for now), because of the transpilation step.

Adding istanbul ignore * solves the issue, but for higher Node versions, for 18.14.2, that is used for our testing environment it's not taken into account.

I'm wondering what is the possible solution here (apart from lowering the coverage thresholds for that test)?

[matz3]

The PR title is a little confusing to me. This does not "enable" a version in the console. It shows a hint in case a new version exists. The user still has to install it.

[RandomByte]

I'm fine with ignoring the coverage decrease for now until we have integration tests.

When rebasing, be aware that we renamed npm-shrinkwrap.json to package-lock.json on main in order to debug a dependabot issue. Also see: #67