Remove codecov node package and use bash uploader (#5937)

package.json

@@ -22,8 +22,7 @@
     "browserify": "^13.1.1",
     "bundle-collapser": "^1.2.1",
     "chai": "^3.5.0",
-    "chalk": "1.1.1",
-    "codecov": "^1.0.1",
+    "chalk": "^1.1.1",
     "derequire": "^2.0.2",
     "eslint": "^3.14.1",
     "eslint-config-babel": "^7.0.1",
@@ -44,7 +43,7 @@
     "mocha": "^3.0.0",
     "nyc": "^10.0.0",
     "output-file-sync": "^1.1.1",
-    "prettier": "1.5.0",
+    "prettier": "^1.5.0",
     "rimraf": "^2.4.3",
     "semver": "^5.0.0",
     "through2": "^2.0.0",