Pattern expander mechanism

[norberttech]

This implementation allows us to create multiple expanders for type patterns.
Each expander can be created with unlimited amount of arguments.
Supported argument types

• string
• number (float/integer)
• boolean
• null
• array

There is only one available expander atm.

• StartsWith($stringBeginning, $ignoreCase = false)
• EndsWith($stringEnding, $ignoreCase = false)
• NotEmpty()
• LowerThan($boundry)
• GreaterThan($boundry)
• InArray($value)

Example expander usage:

$factory = new SimpleFactory();
$matcher = $factory->createMatcher();
$matcher->match("lorem ipsum", "@string@.startsWith('lorem')"); 

Syntax error in pattern expander will throw exception, example:

$factory = new SimpleFactory();
$matcher = $factory->createMatcher();
$matcher->match("lorem ipsum", "@type@.expander('string',not_argument"); 
// Exception message: [Syntax Error] line 0, col 25: Error: Expected "string or number argument", got "not_argument"

Pattern syntax:

@type@.expander(args).expander(args).expander()

You can use as many expanders as you need. You can also create expanders without arguments.

[norberttech]

Added new expanders and possibility to register custom expanders definition at parser object.
Expanders are now available at following patterns:

• String
• Integer
• Double

Not sure if NotBlank is good name for expander, I think we could rename it to NotEmpty and create another Empty expander.
@defrag what do you think, any suggestions?