Update dependency ts-loader to v9

Author: renovate-bot

integration/firestore/package.json

@@ -26,7 +26,7 @@
     "karma-mocha": "2.0.1",
     "karma-spec-reporter": "0.0.32",
     "mocha": "7.2.0",
-    "ts-loader": "8.0.12",
+    "ts-loader": "9.2.0",
     "typescript": "4.2.2",
     "webpack": "4.44.2",
     "webpack-stream": "6.1.1"

package.json

@@ -152,7 +152,7 @@
     "sinon-chai": "3.5.0",
     "source-map-loader": "1.1.3",
     "terser": "5.5.1",
-    "ts-loader": "8.0.12",
+    "ts-loader": "9.2.0",
     "ts-node": "9.1.1",
     "tslint": "6.1.3",
     "typedoc": "0.16.11",