fix: upgrade angular from 1.5.8 to 1.7.9

Snyk has created this PR to upgrade angular from 1.5.8 to 1.7.9.

See this package in NPM:
https://www.npmjs.com/package/angular

See this project in Snyk:
https://app.snyk.io/org/yowainwright/project/03b099ed-f55b-4b6c-983e-577944d94ddf?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -12,7 +12,7 @@
     "ssr-solution": "supervisor -- -r babel-register 'subjects/13-Server-Rendering/solution/server.js'"
   },
   "dependencies": {
-    "angular": "1.5.8",
+    "angular": "1.7.9",
     "babel-core": "^6.23.1",
     "babel-loader": "^6.2.4",
     "babel-preset-env": "^1.6.1",