fix(deps): Fix most `npm audit` problems

Did an `npm audit --fix` on the top level directory, which
automatically fixed 47 of 48 audit warnings.

Not attached to an issue.

package.json

@@ -29,7 +29,7 @@
     "fxa-dev-launcher": "github:vladikoff/fxa-dev-launcher",
     "husky": "^2.5.0",
     "internal-ip": "1.2.0",
-    "lerna": "^3.13.1",
+    "lerna": "^3.15.0",
     "lint-staged": "^8.2.1",
     "madr": "^2.1.2",
     "node-fetch": "^2.3.0",