chore(devDependencies): update nyc@^11.4.1 from template

chore(devDependencies): update rollup@^0.52.2 from template
docs(package): remove keyword null

Author: arlac77

package.json

@@ -34,8 +34,8 @@
     "jsdoc-babel": "^0.3.0",
     "jsdoc-to-markdown": "^3.0.2",
     "markdown-doctest": "^0.9.1",
-    "nyc": "^11.4.0",
-    "rollup": "^0.52.1",
+    "nyc": "^11.4.1",
+    "rollup": "^0.52.2",
     "rollup-plugin-multi-entry": "^2.0.2",
     "semantic-release": "^11.0.2",
     "xo": "^0.19.0"