add self-dependency

Makefile

@@ -14,7 +14,7 @@ deps:
 	yarn
 
 update:
-	node updates.js -cu
+	yarn -s run updates -cu
 	$(MAKE) deps
 
 patch: test

fixtures/test.json

@@ -10,6 +10,9 @@
     "@babel/preset-env": "7.0.0",
     "updates": "https://github.com/silverwind/updates/tarball/6941e05"
   },
+  "devDependencies": {
+    "updates": "file:."
+  },
   "peerDependencies": {
     "@babel/preset-env": "~6.0.0"
   }

package.json

@@ -49,6 +49,7 @@
     "semver": "7.1.3",
     "tempy": "0.5.0",
     "text-table": "0.2.0",
+    "updates": "file:.",
     "versions": "8.2.5"
   },
   "jest": {