build: upgrade @graphql-tools deps to ensure newer @babel/parser and support ts 4.9

Author: awx-doma-lei

packages/graphql-codegen-cli/package.json

@@ -47,9 +47,9 @@
     "@graphql-codegen/core": "^4.0.2",
     "@graphql-codegen/plugin-helpers": "^5.1.1",
     "@graphql-tools/apollo-engine-loader": "^8.0.0",
-    "@graphql-tools/code-file-loader": "^8.0.0",
-    "@graphql-tools/git-loader": "^8.0.0",
-    "@graphql-tools/github-loader": "^8.0.0",
+    "@graphql-tools/code-file-loader": "^8.1.19",
+    "@graphql-tools/git-loader": "^8.0.23",
+    "@graphql-tools/github-loader": "^8.0.19",
     "@graphql-tools/graphql-file-loader": "^8.0.0",
     "@graphql-tools/json-file-loader": "^8.0.0",
     "@graphql-tools/load": "^8.1.0",