Bump execa from 0.10.0 to 1.0.0 (#23)

Bumps [execa](https://github.com/sindresorhus/execa) from 0.10.0 to 1.0.0.
- [Release notes](https://github.com/sindresorhus/execa/releases)
- [Commits](sindresorhus/execa@v0.10.0...v1.0.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -22,7 +22,7 @@
     "eslint-config-prettier": "^2.9.0",
     "eslint-plugin-node": "^6.0.1",
     "eslint-plugin-prettier": "^2.4.0",
-    "execa": "^0.10.0",
+    "execa": "^1.0.0",
     "get-port": "^4.0.0",
     "prettier": "^1.10.2",
     "qunit": "~2.8.0",

yarn.lock

@@ -536,18 +536,6 @@ exec-sh@^0.3.2:
   version "0.3.2"
   resolved "https://registry.yarnpkg.com/exec-sh/-/exec-sh-0.3.2.tgz#6738de2eb7c8e671d0366aea0b0db8c6f7d7391b"
 
-execa@^0.10.0:
-  version "0.10.0"
-  resolved "https://registry.yarnpkg.com/execa/-/execa-0.10.0.tgz#ff456a8f53f90f8eccc71a96d11bdfc7f082cb50"
-  dependencies:
-    cross-spawn "^6.0.0"
-    get-stream "^3.0.0"
-    is-stream "^1.1.0"
-    npm-run-path "^2.0.0"
-    p-finally "^1.0.0"
-    signal-exit "^3.0.0"
-    strip-eof "^1.0.0"
-
 execa@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/execa/-/execa-1.0.0.tgz#c6236a5bb4df6d6f15e88e7f017798216749ddd8"