fix(jest): set testURL to localhost

[limonte]

Fixes #53

• Related issue: JSDom 11.12 causes SecurityError: localStorage is not available for opaque origins jestjs/jest#6766
• Related StackOverflow question: https://stackoverflow.com/questions/51554366/npm-test-fails-with-jest

[coveralls]

Pull Request Test Coverage Report for Build 400

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 97.727%

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Totals
Change from base Build 309:	0.0%
Covered Lines:	32
Relevant Lines:	32

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💛 - Coveralls

[zenflow]

@limonte In master I have removed the release commit and changed the commit message to not use the "fix" commit type.

Yes, the commit "fix"es some problems we're having involving our infrastructure, but it is not a bug fix to the package we're distributing, which is what that commit type is for. Check out the commit types semantic-release understands: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#type

I'm thinking there's no need for a patch release, since the version published would be the exact same as the previious version, with the exception of some development-related parts of package.json (i.e. code would be the exact same).