Remove whitespace at the end of the package.json lines

json.dump appears to add extraneous spaces before newline characters. By
specifying the separators option, we can remove these whitespaces,
reducing the diff noise. Solution taken from
https://stackoverflow.com/questions/16311562/python-json-without-whitespaces

DISABLE_THIRD_PARTY_CHECK=Fix whitespace in node_modules

Change-Id: I26556e5053f19a9021ad41779319bdfe3f8c2b6c
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2013154
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Auto-Submit: Tim van der Lippe <tvanderlippe@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>

node_modules/safe-buffer/package.json

@@ -1,37 +1,37 @@
 {
   "author": {
-    "email": "feross@feross.org", 
-    "name": "Feross Aboukhadijeh", 
+    "email": "feross@feross.org",
+    "name": "Feross Aboukhadijeh",
     "url": "http://feross.org"
-  }, 
+  },
   "bugs": {
     "url": "https://github.com/feross/safe-buffer/issues"
-  }, 
-  "description": "Safer Node.js Buffer API", 
+  },
+  "description": "Safer Node.js Buffer API",
   "devDependencies": {
-    "standard": "*", 
+    "standard": "*",
     "tape": "^4.0.0"
-  }, 
-  "homepage": "https://github.com/feross/safe-buffer", 
+  },
+  "homepage": "https://github.com/feross/safe-buffer",
   "keywords": [
-    "buffer", 
-    "buffer allocate", 
-    "node security", 
-    "safe", 
-    "safe-buffer", 
-    "security", 
+    "buffer",
+    "buffer allocate",
+    "node security",
+    "safe",
+    "safe-buffer",
+    "security",
     "uninitialized"
-  ], 
-  "license": "MIT", 
-  "main": "index.js", 
-  "name": "safe-buffer", 
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "name": "safe-buffer",
   "repository": {
-    "type": "git", 
+    "type": "git",
     "url": "git://github.com/feross/safe-buffer.git"
-  }, 
+  },
   "scripts": {
     "test": "standard && tape test/*.js"
-  }, 
-  "types": "index.d.ts", 
+  },
+  "types": "index.d.ts",
   "version": "5.2.0"
 }