renderer deps update

Author: alexcjohnson

dash/_dash_renderer.py

@@ -7,27 +7,27 @@
                 "https://unpkg.com/@babel/[email protected]/dist/polyfill.min.js",
                 "https://unpkg.com/[email protected]/umd/react.production.min.js",
                 "https://unpkg.com/[email protected]/umd/react-dom.production.min.js",
-                "https://unpkg.com/prop-types@15.7.2/prop-types.min.js",
+                "https://unpkg.com/prop-types@15.8.1/prop-types.min.js",
             ],
             "dev": [
                 "https://unpkg.com/@babel/[email protected]/dist/polyfill.min.js",
                 "https://unpkg.com/[email protected]/umd/react.development.js",
                 "https://unpkg.com/[email protected]/umd/react-dom.development.js",
-                "https://unpkg.com/prop-types@15.7.2/prop-types.js",
+                "https://unpkg.com/prop-types@15.8.1/prop-types.js",
             ],
         },
         "relative_package_path": {
             "prod": [
                 "deps/[email protected]",
                 "deps/[email protected]",
                 "deps/[email protected]",
-                "deps/prop-types@15.7.2.min.js",
+                "deps/prop-types@15.8.1.min.js",
             ],
             "dev": [
                 "deps/[email protected]",
                 "deps/[email protected]",
                 "deps/[email protected]",
-                "deps/prop-types@15.7.2.js",
+                "deps/prop-types@15.8.1.js",
             ],
         },
         "namespace": "dash",