Mark mocha@6 compatibility and upgrade all dependencies

[AviVahl]

• fixed lint warnings in EnhancedMocha.js
• updated bundle snapshot
• switched to @webpack-contrib/defaults

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update
• deps upgrade (not in template)

Motivation / Use-Case

css-loader@2 came out and uses postcss@7.

Breaking Changes

css-loader has breaking changes, but it is only used to load mocha's css here, so nothing breaking is expected.

Additional Info

[AviVahl]

@michael-ciniawsky, any chance you could check this out? :)

[AviVahl]

Upgraded to css-loader@2.0.1.

any chance someone reviews this? perhaps @evilebottnawi?

[AviVahl]

Someone? Anyone?
This is the only reason all our projects have postcss@6 next to postcss@7.

[AviVahl]

Updated dependencies once more. Would be awesome if this could be reviewed/merged/released.

[AviVahl]

@TheLarkInn heya! any idea who do I need to mention for this to get reviewed? :)

[AviVahl]

@evilebottnawi thx for reviewing. any chance to get a release with these dep upgrades?

[AviVahl]

This is frustrating. 😞

[AviVahl]

Ping?

[tomrav]

Any chance this could merged? It's causing a lot of un-needed dependencies down the line.

[alexander-akait]

Currently we have no active maintainers for this project. if somebody want to help us with mocha-loader please ping me and we connect in slack about future and roadmap

[AviVahl]

Both I and @tomrav are willing to keep this one maintained.
We work together at Wix.com and care about keeping this one working.

[alexander-akait]

@AviVahl do you have rights on merge and release (github/npm)?

[AviVahl]

Not sure what you mean.
I have my github user (AviVahl) and npm user (avi.vahl).
Both are setup using two factor authentication.
I have no existing permissions to any project in the webpack/webpack-contrib organizations.

[alexander-akait]

@AviVahl send invite, please ping me when you accept

[AviVahl]

Awesome. Accepted.
Do you guys use continuous or manual deployment to npm?

[alexander-akait]

@AviVahl manual right now, i need you @tomrav npm nickname

@AviVahl Right now do you have ability to merge, right?

[AviVahl]

I do. Thanks.
I want to get the lock file up to date again before merging this PR.
Will also add mocha@6 to peer deps

My npm user: avi.vahl
Tom's npm user: tomrav

[alexander-akait]

@AviVahl Can't add to npm (they still can't fix bug around adding users - user tomrav not found. (same for you), problem exists around 9 mouth), looks we need to me for release, https://npm.community/t/cant-add-collaborators-using-site-and-cli/3546

[alexander-akait]

Just ping me when all will be done

[AviVahl]

Updated all devDeps again. Also marked as compatible with mocha@6.
@tomrav can you review?

[tomrav]

Looks good to me. 👍

[AviVahl]

@evilebottnawi squashed to master. (accidentally omitted the #76 link in the commit title; sorry)
can you release a new patch version? :)

[alexander-akait]

👍

[alexander-akait]

Done https://github.com/webpack-contrib/mocha-loader/releases/tag/v2.0.1