voku/urlify

[*]: update the changelog

• drop support for PHP 7.0
• add GitHub Actions CI for matrix testing, static analysis, and dependency auditing
• widen PHPUnit support
• update "Portable ASCII" from v2.0 -> v2.1
• update "Portable UTF8" from v6.0 -> v6.1

[+]: update "portable ascii" v2

• update "Portable ASCII" from v1.x -> v2.0

[*]: update the changelog

• update "Portable UTF8" from v5 -> v6

[*]: update the changelog

• update "Portable ASCII" from v1.3 -> v1.4

[*]: update the changelog

• fix performance issue v2

[*]: update the changelog

• fix performance issue & make string expanding optional

[*]: update the changelog

• fix for stop-words for e.g. "de_CH"

[*]: update the changelog

• update "Portable ASCII" from v1.2 -> v1.3

[+]: use "Portable ASCII" for much better performance

• use "en" as default language
• use "Portable ASCII" for much better performance

[+]: small fixes + code optimizations

• optimize regex
• use "preg_quote" | thanks @cbj4074
• fix duplicate code

• fix "maxLength" usage
• use phpcs fixer
• add support for "Kazakh" and "Slovak"

• update "Portable UTF8" from v4 -> v5

  -> this is a breaking change without API-changes - but the requirement from "Portable UTF8" has been changed (it no longer requires all polyfills from Symfony)

• drop support for PHP < 7.0
• use "strict_types"

• fix logic of "add_array_to_separator()"
• "remove apostrophes which are not used as quotes around a string"

• use "voku/stop-words" for the URLify::$remove_list
• fix "vietnamese"-language-code ('vn' => 'vi')

• add more languages && update docs
• add more tests

• clean more invalid UTF-8 chars + UTF-8 BOM

• fix "currencies" for "de"

• optimized displaying from "Symbols" and "Currencies"