Doc for static PHP methods doesn't work

[MxRay]

I guess I found similar problem to #276 with a difference that this time docblockr doesn't parse static functions correctly. See gif below:

[MoritzKn]

The regex that parses the function assumes the public keyword to be before static:

docblockr/lib/languages/php.js

Line 42 in d2c5c53

var r = '^\\s*(?:(?P<modifier>(?:(?:final\\s+)?(?:public|protected|private)\\s+)?(?:final\\s+)?(?:static\\s+)?))?' +

Feel free to update it and send a PR