Update dependency gaxios to v3 (#1706)

Author: renovate-bot

datastore/functions/package.json

@@ -20,7 +20,7 @@
   "devDependencies": {
     "@google-cloud/functions-framework": "^1.1.1",
     "child-process-promise": "^2.2.1",
-    "gaxios": "^2.3.1",
+    "gaxios": "^3.0.0",
     "mocha": "^7.0.0",
     "proxyquire": "^2.1.0",
     "sinon": "^9.0.0",

functions/background/package.json

@@ -14,7 +14,7 @@
     "test": "mocha test/*.test.js --timeout=20000"
   },
   "dependencies": {
-    "gaxios": "^2.3.1"
+    "gaxios": "^3.0.0"
   },
   "devDependencies": {
     "@google-cloud/functions-framework": "^1.1.1",