Update VERSION & RELEASENOTES for 7.1.3

NOTE: The version was manually updated in the following files:
* RELEASENOTES.md
* VERSION
* bin/templates/cordova/version
* bin/templates/project/assets/www/cordova.js
* framework/build.gradle
* framework/src/org/apache/cordova/CordovaWebView.java
* package.json

with help from git & bash tricks based on changes in the following
commits for 7.1.2 & 7.1.3-dev versions:
- 725e75fa0d
- f86519b158

FUTURE TBD: it is desired that we can set the version in
one place as discussed in: apache/cordova#50

framework/build.gradle

@@ -42,7 +42,7 @@ apply plugin: 'com.github.dcendents.android-maven'
 apply plugin: 'com.jfrog.bintray'
 
 group = 'org.apache.cordova'
-version = '7.1.3-dev'
+version = '7.1.3'
 
 android {
     compileSdkVersion cdvCompileSdkVersion
@@ -129,9 +129,9 @@ bintray {
         licenses = ['Apache-2.0']
         labels = ['android', 'cordova', 'phonegap']
         version {
-            name = '7.1.3-dev'
+            name = '7.1.3'
             released  = new Date()
-            vcsTag = '7.1.3-dev'
+            vcsTag = '7.1.3'
         }
     }
 }

framework/src/org/apache/cordova/CordovaWebView.java

@@ -31,7 +31,7 @@ import android.webkit.WebChromeClient.CustomViewCallback;
  * are not expected to implement it.
  */
 public interface CordovaWebView {
-    public static final String CORDOVA_VERSION = "7.1.3-dev";
+    public static final String CORDOVA_VERSION = "7.1.3";
 
     void init(CordovaInterface cordova, List<PluginEntry> pluginEntries, CordovaPreferences preferences);