Support for escaping quotes in strings

• Strings with quotes can now be escaped in the same way as PHP.

Thanks to @fatihkizmaz Fatih Kızmaz for this release.

Support for Arrays and multiple number of function parameters

• Full support for arrays in expressions ([3,7,13] or array(2,4,8))
• Support for arrays as parameters to functions like min and max
• Support for variable number of function parameters

Thanks to @fatihkizmaz Fatih Kızmaz for this release.

Support for math on objects

• Support for math on custom objects
• Support for validating variable names, types and values
• Change private properties to protected for better method overriding

Thanks to @mrm Matthijs Meulenbrug for this release.

varExists and better VarNotFound handling

• Added varExists method
• getVar now respects VarNotFoundHandler setting
• Updated github actions

Better PHP 8.1 support

Dropping support for PHP 7.2

Fix scientific notation

Merge pull request #92 from ideatic/fix-scientific-notation

fix: broken support for positive exponent numbers

Unary Plus support

V2.1.8

Release prep (#86)

Better Unary Minus support

Unary Minus (#84)

Fixed unary minus to allow a minus sign in front of functions and parentheses.

Cache Management

Ability not cache expression parsing and clear the cache.

More built in functions

Additional tests Hacktoberfest (#77)

* Additional tests

Co-authored-by: diman3210 <diman-3210@mail.ru>