Wrap integer.d.ts with module

[janwo]

Wrapping a module around integer to solve #270.

[pocesar]

this isn't correct, since you're mixing module declaration types and the rest of the files uses exports

[lutovich]

@janwo I tried this change on your neo4j-test project and it does not seem to help. Am I missing something?

[janwo]

@lutovich It did work for me. Whats the error?

[lutovich]

@janwo never mind, I did not change the import. It works. I'm not entirely sure what exactly does this change mean. Maybe all declaration files should define modules like this?

@pocesar what do you think?