build(deps): bump @grpc/grpc-js from 1.3.6 to 1.8.8

Bumps [@grpc/grpc-js](https://github.com/grpc/grpc-node) from 1.3.6 to 1.8.8.
- [Release notes](https://github.com/grpc/grpc-node/releases)
- [Commits](https://github.com/grpc/grpc-node/compare/@grpc/grpc-js@1.3.6...@grpc/grpc-js@1.8.8)

---
updated-dependencies:
- dependency-name: "@grpc/grpc-js"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

packages/cactus-cmd-api-server/package.json

@@ -58,7 +58,7 @@
     "webpack:dev:web": "webpack --env=dev --target=web --config ../../webpack.config.js"
   },
   "dependencies": {
-    "@grpc/grpc-js": "1.3.6",
+    "@grpc/grpc-js": "1.8.8",
     "@grpc/proto-loader": "0.6.4",
     "@hyperledger/cactus-common": "2.0.0-alpha.1",
     "@hyperledger/cactus-core": "2.0.0-alpha.1",

packages/cactus-core-api/package.json

@@ -78,7 +78,7 @@
     "axios": "0.21.4"
   },
   "devDependencies": {
-    "@grpc/grpc-js": "1.3.6",
+    "@grpc/grpc-js": "1.8.8",
     "@grpc/proto-loader": "0.6.4",
     "@types/express": "4.17.13",
     "make-dir-cli": "3.0.0",