[skip ci] Update execa to the latest version 🚀 (#53)

* fix(package): update execa to version 0.11.0

* chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

Author: greenkeeper[bot]

package.json

@@ -29,7 +29,7 @@
     "private": false,
     "dependencies": {
         "electron-builder": "^20.28.1",
-        "execa": "^0.10.0",
+        "execa": "^0.11.0",
         "fs-extra": "^7.0.0",
         "lodash.merge": "^4.6.1",
         "portfinder": "^1.0.16",

yarn.lock

@@ -4678,6 +4678,18 @@ execa@^0.10.0:
     signal-exit "^3.0.0"
     strip-eof "^1.0.0"
 
+execa@^0.11.0:
+  version "0.11.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-0.11.0.tgz#0b3c71daf9b9159c252a863cd981af1b4410d97a"
+  dependencies:
+    cross-spawn "^6.0.0"
+    get-stream "^4.0.0"
+    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@^0.7.0:
   version "0.7.0"
   resolved "https://registry.yarnpkg.com/execa/-/execa-0.7.0.tgz#944becd34cc41ee32a63a9faf27ad5a65fc59777"
@@ -5317,6 +5329,12 @@ get-stream@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-3.0.0.tgz#8e943d1358dc37555054ecbe2edb05aa174ede14"
 
+get-stream@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-4.0.0.tgz#9e074cb898bd2b9ebabb445a1766d7f43576d977"
+  dependencies:
+    pump "^3.0.0"
+
 get-value@^2.0.3, get-value@^2.0.6:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/get-value/-/get-value-2.0.6.tgz#dc15ca1c672387ca76bd37ac0a395ba2042a2c28"
@@ -9375,6 +9393,13 @@ pump@^2.0.0, pump@^2.0.1:
     end-of-stream "^1.1.0"
     once "^1.3.1"
 
+pump@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pump/-/pump-3.0.0.tgz#b4a2116815bde2f4e1ea602354e8c75565107a64"
+  dependencies:
+    end-of-stream "^1.1.0"
+    once "^1.3.1"
+
 pumpify@^1.3.3:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/pumpify/-/pumpify-1.5.1.tgz#36513be246ab27570b1a374a5ce278bfd74370ce"