[readme] fix repo URLs, remove testling

Author: ljharb

package.json

@@ -37,9 +37,9 @@
   },
   "repository": {
     "type": "git",
-    "url": "git://github.com/substack/object-inspect.git"
+    "url": "git://github.com/inspect-js/object-inspect.git"
   },
-  "homepage": "https://github.com/substack/object-inspect",
+  "homepage": "https://github.com/inspect-js/object-inspect",
   "keywords": [
     "inspect",
     "util.inspect",

readme.markdown

@@ -2,9 +2,7 @@
 
 string representations of objects in node and the browser
 
-[![testling badge](https://ci.testling.com/substack/object-inspect.png)](https://ci.testling.com/substack/object-inspect)
-
-[![build status](https://secure.travis-ci.org/substack/object-inspect.png)](http://travis-ci.org/substack/object-inspect)
+[![build status](https://secure.travis-ci.com/inspect-js/object-inspect.png)](https://travis-ci.com/inspect-js/object-inspect)
 
 # example