.npmignore: Unignore components.js (#1108)

For the trick suggested by @apfelbox in
#593 (comment)
to work, we need both of these files to be in the NPM package:

/components.js
/tests/helper/components.js

Author: papandreou

.npmignore

@@ -14,4 +14,3 @@ download.js
 prefixfree.min.js
 utopia.js
 code.js
-components.js