style: convert string class names to constants (#1252) #89

Job	Run time
Subtree for Plugin	7s
Subtree for Common	7s
Subtree for Http	7s
Subtree for provider GeoPlugin	8s
Subtree for provider GeoIP2	7s
Subtree for provider FreeGeoIp	7s
Subtree for provider Cache	10s
Subtree for provider ArcGISOnline	11s
Subtree for provider AzureMaps	6s
Subtree for provider AlgoliaPlaces	8s
Subtree for provider Chain	7s
Subtree for provider Ipstack	8s
Subtree for provider Geonames	10s
Subtree for provider GoogleMapsPlaces	6s
Subtree for provider IP2Location	7s
Subtree for provider HostIp	7s
Subtree for provider GraphHopper	7s
Subtree for provider IpInfo	8s
Subtree for provider IP2LocationBinary	11s
Subtree for provider Here	10s
Subtree for provider IpInfoDb	7s
Subtree for provider GeocodeEarth	11s
Subtree for provider MaxMind	8s
Subtree for provider TomTom	8s
Subtree for provider GoogleMaps	10s
Subtree for provider OpenCage	6s
Subtree for provider Nominatim	6s
Subtree for provider OpenRouteService	7s
Subtree for provider LocationIQ	7s
Subtree for provider Mapbox	6s
Subtree for provider Pelias	6s
Subtree for provider PickPoint	10s
Subtree for provider Photon	8s
Subtree for provider MaxMindBinary	7s
Subtree for provider MapQuest	8s
Subtree for provider BingMaps	7s
Subtree for provider Yandex	8s
	4m 49s

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