Standardized test setup

Author: ijlee2

config/ember-try.js

@@ -70,7 +70,7 @@ module.exports = async function() {
         },
         npm: {
           devDependencies: {
-            '@ember/jquery': '^0.5.1'
+            '@ember/jquery': '^1.1.0'
           }
         }
       },

tests/dummy/config/targets.js

@@ -6,13 +6,12 @@ const browsers = [
   'last 1 Safari versions'
 ];
 
-// TODO: Temporary fix for Travis tests
-// const isCI = !!process.env.CI;
-// const isProduction = process.env.EMBER_ENV === 'production';
-//
-// if (isCI || isProduction) {
-//   browsers.push('ie 11');
-// }
+const isCI = Boolean(process.env.CI);
+const isProduction = process.env.EMBER_ENV === 'production';
+
+if (isCI || isProduction) {
+  browsers.push('ie 11');
+}
 
 module.exports = {
   browsers