chore(deps): update dependency execa to v1

Author: renovate-bot

package.json

@@ -54,7 +54,7 @@
     "coveralls": "3.0.2",
     "cz-conventional-changelog": "2.1.0",
     "diff": "3.5.0",
-    "execa": "0.11.0",
+    "execa": "1.0.0",
     "nyc": "12.0.2",
     "prop-types": "15.6.2",
     "react": "16.4.2",

yarn.lock

@@ -2057,9 +2057,9 @@ event-emitter@~0.3.5:
     d "1"
     es5-ext "~0.10.14"
 
-execa@0.11.0:
-  version "0.11.0"
-  resolved "https://registry.yarnpkg.com/execa/-/execa-0.11.0.tgz#0b3c71daf9b9159c252a863cd981af1b4410d97a"
+execa@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-1.0.0.tgz#c6236a5bb4df6d6f15e88e7f017798216749ddd8"
   dependencies:
     cross-spawn "^6.0.0"
     get-stream "^4.0.0"