Fixing a regression bug

When removing the ~ (tilde) syntax from `package.json`, it was not replaced with thew new ^ syntax.
Version 0.2.1 therefore was using 0.1.3 of each-async, while Version 1.0 regressed to 0.1.0 of each-async.

- Adds ^ syntax to each-async
- Sets minimum each-async to 0.1.3

*Note* Tests are failing for me. The hashes for md5 do not match what's in the test cases. This looks more like an issue with the previous hashes using crypto.createHash at a different version with (somehow?) different output. I cannot explain that.

Fixes #39 
@geedew yes, we'll just add it in the changelog.