Docs and support for laravel collection

Features:

• Return collection on get method if laravel is available.✔️
• Full documentation.✔️
• Return captured groups while using group() method with get().✔️

Fixes:

• Remove the default quantifier inside charSet.✔️
• Remove extra "[]" inside charSet.✔️
• Rename the "allowChars" option to "onlyChars".✔️

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What's Changed

• Update documentation and add advanced usage section by @MaestroError in #5
• Extra sections for docs by @MaestroError in #6
• Added support for laravel collection in get method by @MaestroError in #7

Full Changelog: 1.0.1...1.2.0