breaking: bump package 8.0.0-dev (#375)

diff --git a/VERSION b/VERSION
index f7446a0..e4be07b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-7.1.0-dev
+8.0.0-dev
diff --git a/package.json b/package.json
index 5fc4dd9..d986787 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cordova-windows",
-  "version": "7.1.0-dev",
+  "version": "8.0.0-dev",
   "description": "cordova-windows release",
   "bin": "bin/create",
   "main": "template/cordova/Api.js",
diff --git a/template/cordova/version b/template/cordova/version
index dfda0a7..935b52d 100644
--- a/template/cordova/version
+++ b/template/cordova/version
@@ -20,7 +20,7 @@
 */
 
 // Coho updates this line:
-var VERSION = '7.1.0-dev';
+var VERSION = '8.0.0-dev';
 
 module.exports.version = VERSION;
 
diff --git a/template/www/cordova.js b/template/www/cordova.js
index e68fe84..9ccfc7f 100644
--- a/template/www/cordova.js
+++ b/template/www/cordova.js
@@ -19,7 +19,7 @@
  under the License.
 */
 ;(function() {
-var PLATFORM_VERSION_BUILD_LABEL = '7.1.0-dev';
+var PLATFORM_VERSION_BUILD_LABEL = '8.0.0-dev';
 // file: src/scripts/require.js
 
 var require;