chore(deps): update dependency mocha to v7 (#121)

Author: renovate-bot

packages/google-devtools-containeranalysis/package.json

@@ -36,7 +36,7 @@
     "jsdoc-fresh": "^1.0.1",
     "jsdoc-region-tag": "^1.0.2",
     "linkinator": "^1.5.0",
-    "mocha": "^6.1.4",
+    "mocha": "^7.0.0",
     "power-assert": "^1.6.1",
     "prettier": "^1.17.1"
   },

packages/google-devtools-containeranalysis/samples/package.json

@@ -20,7 +20,7 @@
   },
   "devDependencies": {
     "chai": "^4.2.0",
-    "mocha": "^6.1.4",
+    "mocha": "^7.0.0",
     "uuid": "^3.3.2"
   }
 }