Update dependency @types/is to v0.0.21

Author: renovate-bot

package.json

@@ -15,7 +15,7 @@
   "author": "Juan Camilo Guarín P",
   "license": "MIT",
   "devDependencies": {
-    "@types/is": "0.0.19",
+    "@types/is": "0.0.21",
     "@types/jest": "22.1.3",
     "@types/node": "8.10.2",
     "jest": "21.2.1",

yarn.lock

@@ -37,9 +37,10 @@
     chalk "^2.0.0"
     js-tokens "^4.0.0"
 
-"@types/is@0.0.19":
-  version "0.0.19"
-  resolved "https://registry.yarnpkg.com/@types/is/-/is-0.0.19.tgz#0fd42363a1233c70659b5a5373d6309a68a07022"
+"@types/is@0.0.21":
+  version "0.0.21"
+  resolved "https://registry.yarnpkg.com/@types/is/-/is-0.0.21.tgz#1f4b0afe428991564abbd890844eba2458bc83e6"
+  integrity sha512-j2v73mj4I47lOaA8r+5tknsgsqlRPDN224sS0Y7ORzlx3AXxqL6RhK/BRhEMP98RJIVW7WTnXZ9ZqQSNdWWuwg==
 
 "@types/jest@22.1.3":
   version "22.1.3"