Fixed touchaction test page

[gwynjudd]

Would get this error:

hammer.js:355 Uncaught TypeError: Cannot call a class as a function
    at classCallCheck (file:///C:/Users/gjudd/Develop/github/hammer.js/hammer.js:355:11)
    at Hammer (file:///C:/Users/gjudd/Develop/github/hammer.js/hammer.js:2886:3)
    at file:///C:/Users/gjudd/Develop/github/hammer.js/tests/manual/touchaction.html:76:22
    at Array.forEach (native)
    at Function.each (file:///C:/Users/gjudd/Develop/github/hammer.js/hammer.js:178:9)
    at file:///C:/Users/gjudd/Develop/github/hammer.js/tests/manual/touchaction.html:73:16

[squadette]

This has been applied in proposed 2.1.0: squadette#1

https://squadette.github.io/hammer.js/dist/tests/manual/touchaction.html

Thank you,