Use @condenast/bundlesize to avoid compiling iltorb. (#4538)

siddharthkp/bundlesize#260 (comment)

Also using @condenast/bundlesize for the apollo-link packages:
apollographql/apollo-link#965

package.json

@@ -60,6 +60,7 @@
     "graphql-anywhere": "file:packages/graphql-anywhere"
   },
   "devDependencies": {
+    "@condenast/bundlesize": "0.18.1",
     "@octokit/rest": "16.16.3",
     "@types/benchmark": "1.0.31",
     "@types/graphql": "14.0.7",
@@ -70,7 +71,6 @@
     "@types/react": "16.8.6",
     "@types/react-dom": "16.8.2",
     "benchmark": "2.1.4",
-    "bundlesize": "0.17.1",
     "check-if-folder-contents-changed-in-git-commit-range": "1.0.0",
     "codecov": "3.2.0",
     "danger": "7.0.14",