Merge pull request #2114 from murgatroid99/proto-loader_revert_long

proto-loader: Switch `long` dependency back to 4.x

Author: murgatroid99

packages/proto-loader/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@grpc/proto-loader",
-  "version": "0.6.11",
+  "version": "0.6.12",
   "author": "Google Inc.",
   "contributors": [
     {
@@ -47,7 +47,7 @@
   "dependencies": {
     "@types/long": "^4.0.1",
     "lodash.camelcase": "^4.3.0",
-    "long": "^4.0.0 || ^5.2.0",
+    "long": "^4.0.0",
     "protobufjs": "^6.10.0",
     "yargs": "^16.2.0"
   },