build: Replace Travis with GitHub CI

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@edx/frontend-app-gradebook",
-  "version": "1.4.47",
+  "version": "1.5.0",
   "description": "edx editable gradebook-ui to manipulate grade overrides on subsections",
   "repository": {
     "type": "git",
@@ -17,8 +17,7 @@
     "semantic-release": "semantic-release",
     "start": "fedx-scripts webpack-dev-server --progress",
     "test": "TZ=GMT fedx-scripts jest --coverage --passWithNoTests",
-    "watch-tests": "jest --watch",
-    "travis-deploy-once": "travis-deploy-once"
+    "watch-tests": "jest --watch"
   },
   "author": "edX",
   "license": "AGPL-3.0",
@@ -78,7 +77,6 @@
     "react-test-renderer": "^16.10.1",
     "reactifex": "1.1.1",
     "redux-mock-store": "^1.5.3",
-    "semantic-release": "^17.2.3",
-    "travis-deploy-once": "^5.0.11"
+    "semantic-release": "^17.2.3"
   }
 }