chore: bump to next major release 6.0.0 (#1033)

* chore: bump to next major release 6.0.0

* update Cordova dependencies

* bump version just like geolocation

https://github.com/apache/cordova-plugin-geolocation/blob/master/package.json#L34-L37

* Update dependencies in package-lock.json

package.json

@@ -1,6 +1,6 @@
 {
   "name": "cordova-plugin-inappbrowser",
-  "version": "5.1.0-dev",
+  "version": "6.0.0-dev",
   "description": "Cordova InAppBrowser Plugin",
   "types": "./types/index.d.ts",
   "cordova": {
@@ -43,6 +43,11 @@
         "cordova": ">=9.0.0"
       },
       "6.0.0": {
+        "cordova-android": ">=10.0.0",
+        "cordova-ios": ">=6.0.0",
+        "cordova": ">=9.0.0"
+      },
+      "7.0.0": {
         "cordova": ">100"
       }
     }