Use built-in RegExp.escape if available

[timokoessler]

[codecov[bot]]

Codecov Report

:x: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
library/helpers/escapeStringRegexp.ts	87.50%	1 Missing :warning:

:loudspeaker: Thoughts on this report? Let us know!

[timokoessler]

Codecov Report

❌ Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review. Files with missing lines Patch % Lines library/helpers/escapeStringRegexp.ts 87.50% 1 Missing ⚠️

📢 Thoughts on this report? Let us know!

Not really true, I guess because RegExp is always defined. :D