feat(#1472): add excluding specific mutations

[bartekleon]

fixes #1472

[bartekleon]

for now only

stryker:on
stryker:off
stryker:on MutatorName...
stryker:off MutatorName...

are working

stryker:next-on
stryker:next-off

are not implemented yet, since there were several problems with it

[bartekleon]

next-on and next-off are working now!
Next thing is to do the same for typescript mutator :)

[bartekleon]

Help needed. I can't extract a comment from TS file :/ any help would be nice

[Djaler]

@kmdrGroch check this microsoft/TypeScript#21049 (comment)

[bartekleon]

@Djaler I saw it, but it didn't really help me :/

[bartekleon]

@Djaler so with help of that comment, I somehow managed to get these comments.
But now I need some help with tests. Some of them aren't passing. @nicojs, @simondel, @Djaler any idea? (I am not even sure they are good, but looking at logs, they are) :< next-on and next-off don't work for sure

[nicojs]

I would be happy to accept a merge request that only implements the babel-side of things. We will need to make clear remarks in the readme's

[bartekleon]

I'd like #1718 this PR to be accepted, so I can start this over again.