Merge pull request #1017 from murgatroid99/proto_loader_0.5.2

Bump proto-loader to 0.5.2

Author: murgatroid99

packages/proto-loader/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@grpc/proto-loader",
-  "version": "0.5.1",
+  "version": "0.5.2",
   "author": "Google Inc.",
   "contributors": [
     {