keep MapboxV10 constant as deprecated

The constant actually means "v10 or later" and is always true. Keep it
for backwards compatibility but mark as deprecated.

Author: mfazekas

android/src/main/java/com/rnmapbox/rnmbx/modules/RNMBXModule.kt

@@ -114,6 +114,8 @@ class RNMBXModule(private val mReactContext: ReactApplicationContext) : ReactCon
         val locationModuleCallbackNames: MutableMap<String, String> = HashMap()
         locationModuleCallbackNames["Update"] = RNMBXLocationModule.LOCATION_UPDATE
         return MapBuilder.builder<String, Any>()
+            // Deprecated: means v10 or later, always true. Will be removed in next major version.
+            .put("MapboxV10", true)
             .put("StyleURL", styleURLS)
             .put("EventTypes", eventTypes)
             .put("StyleSource", styleSourceConsts)

ios/RNMBX/RNMBXModule.swift

@@ -23,6 +23,8 @@ class RNMBXModule : NSObject {
   @objc
   func constantsToExport() -> [AnyHashable: Any]! {
     return [
+      // Deprecated: means v10 or later, always true. Will be removed in next major version.
+      "MapboxV10":true,
       "StyleURL":
         [
           "Street": StyleURI.streets.rawValue,

setup-jest.js

@@ -99,6 +99,8 @@ NativeModules.RNMBXModule = {
   setTelemetryEnabled: jest.fn(),
   setConnected: jest.fn(),
   clearData: jest.fn(),
+  // Deprecated: means v10 or later, always true. Will be removed in next major version.
+  MapboxV10: true,
 };
 
 NativeModules.RNMBXOfflineModule = nativeModule({