Adding Safari 11.1 (desktop) with tests

[jaydiablo]

Fixes #1848

I searched for all cases of Safari 11.1 and only found these three useragents, which matches Apple’s docs about Safari 11.1: https://developer.apple.com/library/content/releasenotes/General/WhatsNewInSafari/Articles/Safari_11_1.html#//apple_ref/doc/uid/TP40014305-CH14-SW1

I moved 11.1 to its own file because of the CFNetwork patterns in the 11.0 file being version-less and because 11.1 is only available OSX 10.13, 10.12 and 10.11 anyhow.

I also looked at iOS to see if 11.1 needed to be added there, but like other versions of Safari, the x.1 versions don’t report that way on iOS (tested on my own phone which is on iOS 11.3).

[codecov]

Codecov Report

Merging #1852 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #1852      +/-   ##
============================================
+ Coverage     49.15%   49.16%   +<.01%     
  Complexity      758      758              
============================================
  Files          1642     1643       +1     
  Lines         59784    59789       +5     
  Branches      26704    26706       +2     
============================================
+ Hits          29389    29394       +5     
  Misses        30395    30395

Flag	Coverage Δ	Complexity Δ
#full	43.61% <80%> (ø)	0 <0> (ø)	⬇️
#lite	1.76% <80%> (ø)	0 <0> (ø)	⬇️
#standard	25.22% <80%> (ø)	0 <0> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
...urces/user-agents/browsers/safari/safari-11-0.json	35% <ø> (ø)	0 <0> (?)
...urces/user-agents/browsers/safari/safari-11-1.json	100% <100%> (ø)	0 <0> (?)

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