Merge pull request learningequality#5614 from learningequality/dependabot/npm_and_yarn/workbox-precaching-7.4.0

chore(deps): bump workbox-precaching from 7.3.0 to 7.4.0

Author: rtibbles

package.json

@@ -102,7 +102,7 @@
     "vuetify": "^1.5.24",
     "vuex": "^3.0.1",
     "workbox-core": "^7.4.0",
-    "workbox-precaching": "^7.3.0",
+    "workbox-precaching": "^7.4.0",
     "workbox-routing": "^7.3.0",
     "workbox-strategies": "^7.3.0",
     "workbox-window": "^7.3.0"