fix(deps): update dependency gaxios to v5 (#1398)

Author: renovate-bot

package.json

@@ -21,8 +21,8 @@
     "base64-js": "^1.3.0",
     "ecdsa-sig-formatter": "^1.0.11",
     "fast-text-encoding": "^1.0.0",
-    "gaxios": "^4.0.0",
-    "gcp-metadata": "^4.2.0",
+    "gaxios": "^5.0.0",
+    "gcp-metadata": "^5.0.0",
     "gtoken": "^5.3.2",
     "jws": "^4.0.0",
     "lru-cache": "^6.0.0"
@@ -51,12 +51,11 @@
     "karma-coverage": "^2.0.0",
     "karma-firefox-launcher": "^2.0.0",
     "karma-mocha": "^2.0.0",
-    "karma-remap-coverage": "^0.1.5",
     "karma-sourcemap-loader": "^0.3.7",
     "karma-webpack": "^5.0.0",
     "keypair": "^1.0.4",
-    "linkinator": "^2.0.0",
-    "mocha": "^8.0.0",
+    "linkinator": "^3.0.3",
+    "mocha": "^9.2.2",
     "mv": "^2.1.1",
     "ncp": "^2.0.0",
     "nock": "^13.0.0",