fix: double bug fix

[KilianKilmister]

• fixes #90
• fixes inability to match anchors that include the endTag-string anywhere in them

I also included a screenshot like the others, showcasing the case-sensitive anchors and added it to the readme, but it's with my vscode theme, so it should be treated as a placeholder.

[macjuul]

Thanks for the PR! My apologies for the delay, I'm planning on releasing a new version in the coming days including your changes.