Move "good" badge helpers from lib/ to services/ (#3101)

This moves a few helpers from `lib/` to `services/`:

build-status.js
build-status.spec.js
color-formatters.js
color-formatters.spec.js
contributor-count.js
licenses.js
licenses.spec.js
php-version.js
php-version.spec.js
text-formatters.js
text-formatters.spec.js
version.js
version.spec.js

And one from `lib/` to `core/`:

unhandled-rejection.spec.js

The diff is long, but the changes are straightforward.

Ref #2832

services/gem/gem-downloads.service.js

@@ -2,9 +2,9 @@
 
 const semver = require('semver')
 const Joi = require('joi')
-const { downloadCount } = require('../../lib/color-formatters')
-const { metric } = require('../../lib/text-formatters')
-const { latest: latestVersion } = require('../../lib/version')
+const { downloadCount } = require('../color-formatters')
+const { metric } = require('../text-formatters')
+const { latest: latestVersion } = require('../version')
 const { BaseJsonService, InvalidParameter, InvalidResponse } = require('..')
 const { nonNegativeInteger } = require('../validators')
 

services/gem/gem-owner.service.js

@@ -2,7 +2,7 @@
 
 const Joi = require('joi')
 const { BaseJsonService } = require('..')
-const { floorCount: floorCountColor } = require('../../lib/color-formatters')
+const { floorCount: floorCountColor } = require('../color-formatters')
 
 const ownerSchema = Joi.array().required()
 

services/gem/gem-rank.service.js

@@ -1,8 +1,8 @@
 'use strict'
 
 const Joi = require('joi')
-const { floorCount } = require('../../lib/color-formatters')
-const { ordinalNumber } = require('../../lib/text-formatters')
+const { floorCount } = require('../color-formatters')
+const { ordinalNumber } = require('../text-formatters')
 const { BaseJsonService, InvalidResponse } = require('..')
 
 const keywords = ['ruby']

services/gem/gem-version.service.js

@@ -1,7 +1,7 @@
 'use strict'
 
 const Joi = require('joi')
-const { renderVersionBadge } = require('../../lib/version')
+const { renderVersionBadge } = require('../version')
 const { BaseJsonService } = require('..')
 
 const schema = Joi.object({