Remove "typing-inspect<0.4" dependency

[akhait]

Hi,

I was wondering, is it really necessary to have typing-inspect version older that 0.4 installed to use Molten? After I removed this requirement from setup.py, I was still able to run at least few example scripts from this repo with typing-inspect-0.5 installed. Is there any reason why someone should use older typing-inspect version?

Thanks in advance.

[androiddrew]

@akhait Looks like Molten's last change to setup.py was back in Feb and the typing-inspect=0.5 release was in earlier October. This just means that dependencies are getting a little stale on the this project. Maybe you can submit a PR and let the Travis CI prove out at that typing-inspect=0.5 doesn't have any breaking changes.