package: Change qunitjs devDependency from 1.x to 1.11.0

In QUnit v1.12 several addons were removed. Though composite
does not depend on any addons, its test suite does (it accesses
the addons' test suites and uses those as examples to run with
qunit-composite).
test: Use local tests instead of form addons and update QUnit to 1.12

Follows-up 212ab2f. Fixes #2.
Merge pull request #1 from Krinkle/master

travis: Test in nodejs 0.10