Keep Variables same Across Builds

Happy to have a pull request

• Add more functionality
• Improve readability
• Kinder testing if a variable exists in a rule, great for people who don't use a css formatter
• Fix the current algorithm to use the old variables, its almost there

What's Changed

• [Snyk] Upgrade postcss from 8.4.21 to 8.4.24 by @navanshu in #40
• As always zero dependencies
• Keeping track of variables accross build by storing them in a file 💀

Full Changelog: v3.0.0...V4.0.0.0_Beta

Not available on NPM as it is actually broken, I don't want to break peoples working system only to get blamed for this

Updating test files with typescript

v3.0.0

3.0.0

v2.0.0

Fixed the exports for typescript users... thanks to @Kaciras

V1.0.0

• There is really no breaking change
• No need to pass an empty array that's it

v0.2.5

Updated the test, now meets 100% coverage.
Updated Dependecies.

v0.2.1

Update to api to allow passing in custom function to check if a variable should be renamed or not

v0.1.3

• Fixed the scoping issue in the variable
• Trying to circumvent the Regex. Can't remove it yet but have some checks before regex in place.
• Plugin notifies postcss about if a Declaration has been processed.

v0.1.2

Fixing readme

v0.1.1

Updated readme with proper way to pass the configuration

v0.1.0

Update CHANGELOG.md