Add native `RelativeTimeFormat` to `display` section `Time from now` item

[zac1st1k]

A test failure is expected on Node.js v10 (non-active LTS). Adding a polyfill or removing v10 from travis matrix could resolve the problem. https://nodejs.org/en/about/releases/

The test would fail on Safari 13- according to https://caniuse.com/#search=Intl%3A%20RelativeTimeFormat%3A%20format

[coveralls]

Pull Request Test Coverage Report for Build 224

• 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 100.0%

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Totals
Change from base Build 223:	0.0%
Covered Lines:	43
Relevant Lines:	43

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💛 - Coveralls