Set PERCY_PARALLEL_TOTAL to 1; the Percy Ember package works differently

Author: carols10cents

.travis.yml

@@ -20,7 +20,6 @@ env:
     - DATABASE_URL=postgres://postgres:@localhost/cargo_registry_test
     - TEST_DATABASE_URL=postgres://postgres:@localhost/cargo_registry_test
     - CARGO_INCREMENTAL=0
-    - PERCY_PARALLEL_TOTAL=2
     # Percy secrets are included here to enable Percy's GitHub integration
     # on community-submitted PRs
     - PERCY_TOKEN=0d8707a02b19aebbec79bb0bf302b8d2fa95edb33169cfe41b084289596670b1

package.json

@@ -39,12 +39,12 @@
     "ember-cli-app-version": "^3.1.3",
     "ember-cli-babel": "^7.13.2",
     "ember-cli-clipboard": "^0.9.0",
-    "ember-cli-code-coverage": "^1.0.0-beta.8",
+    "ember-cli-code-coverage": "^1.0.0-beta.4",
     "ember-cli-dependency-checker": "^2.0.1",
     "ember-cli-dependency-lint": "^1.1.3",
     "ember-cli-fastboot": "^2.2.1",
     "ember-cli-htmlbars": "^4.2.0",
-    "ember-cli-inject-live-reload": "2.0.2",
+    "ember-cli-inject-live-reload": "1.6.1",
     "ember-cli-meta-tags": "^5.3.0",
     "ember-cli-mirage": "^1.1.6",
     "ember-cli-moment-shim": "^3.7.1",
@@ -72,7 +72,7 @@
     "ember-source": "~3.15.0",
     "ember-svg-jar": "^2.2.3",
     "ember-test-selectors": "^3.0.0",
-    "ember-web-app": "^3.0.1",
+    "ember-web-app": "^2.2.0",
     "emberx-select": "^3.1.1",
     "eslint": "^6.3.0",
     "eslint-config-prettier": "^6.7.0",