Remove supporting cordova-android@6 and less (#633)

* Remove hook for installing old versions of plugins

* Remove types for cordova-plugin-file-transfer

Author: alexandergoncharov-zz

hooks/afterPluginAdd.js

@@ -30,7 +30,6 @@
     "@types/cordova-plugin-device": "^1.1.5",
     "@types/cordova-plugin-dialogs": "^1.3.2",
     "@types/cordova-plugin-file": "^0.0.3",
-    "@types/cordova-plugin-file-transfer": "^1.6.2",
     "@types/mkdirp": "^0.5.2",
     "@types/mocha": "^5.2.7",
     "@types/node": "^12.6.3",

package-lock.json

@@ -13,9 +13,6 @@
         <dependency id="cordova-plugin-advanced-http" version=">=2.2.0" />
         <dependency id="cordova-plugin-zip" version=">=3.1.0" />
 
-        <hook type="after_plugin_add" src="hooks/afterPluginAdd.js" />
-
-
         <js-module src="bin/www/codePush.js" name="codePush">
             <clobbers target="codePush" />
         </js-module>