Add polyfills for endsWith and startsWith (#1113)

diff --git a/webpack.config.dev.js b/webpack.config.dev.js
index 7bbb774..c1805c3 100644
--- a/webpack.config.dev.js
+++ b/webpack.config.dev.js
@@ -20,7 +20,7 @@
 
 module.exports = {
   entry: {
-    bundle: ['core-js/fn/array', 'core-js/fn/object', 'core-js/fn/symbol', 'core-js/fn/promise', 'regenerator-runtime/runtime', './app/main.js'] //Our starting point for our development.
+    bundle: ['core-js/fn/array', 'core-js/fn/string/ends-with', 'core-js/fn/string/starts-with', 'core-js/fn/object', 'core-js/fn/symbol', 'core-js/fn/promise', 'regenerator-runtime/runtime', './app/main.js'] //Our starting point for our development.
   },
 
   output: {
diff --git a/webpack.config.release.js b/webpack.config.release.js
index 44cd68c..8b9389f 100644
--- a/webpack.config.release.js
+++ b/webpack.config.release.js
@@ -22,7 +22,7 @@
 module.exports = {
   // Entry point for static analyzer:
   entry: {
-    bundle: ['core-js/fn/array', 'core-js/fn/object', 'core-js/fn/symbol', 'core-js/fn/promise', 'regenerator-runtime/runtime', './app/main.js']
+    bundle: ['core-js/fn/array', 'core-js/fn/string/ends-with', 'core-js/fn/string/starts-with',  'core-js/fn/object', 'core-js/fn/symbol', 'core-js/fn/promise', 'regenerator-runtime/runtime', './app/main.js']
   },
 
   output: {