Bump execa from 3.4.0 to 4.0.0 (#211)

Bumps [execa](https://github.com/sindresorhus/execa) from 3.4.0 to 4.0.0.
- [Release notes](https://github.com/sindresorhus/execa/releases)
- [Commits](sindresorhus/execa@v3.4.0...v4.0.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package.json

@@ -45,7 +45,7 @@
     "eslint": "^6.8.0",
     "eslint-config-prettier": "^6.10.0",
     "eslint-plugin-prettier": "^3.1.2",
-    "execa": "^3.4.0",
+    "execa": "^4.0.0",
     "jest": "^25.1.0",
     "prettier": "^1.19.1",
     "release-it": "^12.4.3",

yarn.lock

@@ -2708,7 +2708,7 @@ execa@^2.0.4:
     signal-exit "^3.0.2"
     strip-final-newline "^2.0.0"
 
-execa@^3.2.0, execa@^3.4.0:
+execa@^3.2.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/execa/-/execa-3.4.0.tgz#c08ed4550ef65d858fac269ffc8572446f37eb89"
   integrity sha512-r9vdGQk4bmCuK1yKQu1KTwcT2zwfWdbdaXfCtAh+5nU/4fSX+JAb7vZGvI5naJrQlvONrEB20jeruESI69530g==
@@ -2724,6 +2724,21 @@ execa@^3.2.0, execa@^3.4.0:
     signal-exit "^3.0.2"
     strip-final-newline "^2.0.0"
 
+execa@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-4.0.0.tgz#7f37d6ec17f09e6b8fc53288611695b6d12b9daf"
+  integrity sha512-JbDUxwV3BoT5ZVXQrSVbAiaXhXUkIwvbhPIwZ0N13kX+5yCzOhUNdocxB/UQRuYOHRYYwAxKYwJYc0T4D12pDA==
+  dependencies:
+    cross-spawn "^7.0.0"
+    get-stream "^5.0.0"
+    human-signals "^1.1.1"
+    is-stream "^2.0.0"
+    merge-stream "^2.0.0"
+    npm-run-path "^4.0.0"
+    onetime "^5.1.0"
+    signal-exit "^3.0.2"
+    strip-final-newline "^2.0.0"
+
 exit@^0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/exit/-/exit-0.1.2.tgz#0632638f8d877cc82107d30a0fff1a17cba1cd0c"