Add run command, refactor tests

[mikeymike]

Hoping this is all right, I was behind master so rebased but I had to manually resolve some conflicts. I think it's okay but could be wrong 😂

Also got to double check Travis tests

[codecov-io]

Current coverage is 89.73%

Merging #72 into master will decrease coverage by -1.57% as of b8db6b2

@@            master     #72   diff @@
======================================
  Files           68      69     +1
  Stmts         1576    1656    +80
  Branches         0       0       
  Methods        268     274     +6
======================================
+ Hit           1439    1486    +47
  Partial          0       0       
- Missed         137     170    +33

Review entire Coverage Diff as of b8db6b2

Powered by Codecov. Updated on successful CI builds.

[mikeymike]

darn it also dropped coverage 👎

[mikeymike]

hmmm just Travis

[mikeymike]

@AydinHassan I can't re-create the test failing locally on any PHP version. Can you pull down and run them. On Travis 7.0 failed then after re-run 7.0 passed and 5.6 failed. Pretty sure it was on the same test too.

[AydinHassan]

This should type hint the PSR RequestInterface

[mikeymike]

@AydinHassan I'll rebase before merge if all is good 👍

[mikeymike]

my bad didn't re-run the test 🐰

[AydinHassan]

@mikeymike This ready? Can we squash it?

[mikeymike]

Yeah can do, I did just realise I hadn't written a test for the RunCommand itself 😑 ... I can do this after the merge though, got nothing better to be doing 😆

What do you think ?

[AydinHassan]

Yeah, fine by me 😄 That's probably why the coverage went down!