Build(deps-dev): Bump get-port from 4.1.0 to 4.2.0

Bumps [get-port](https://github.com/sindresorhus/get-port) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/sindresorhus/get-port/releases)
- [Commits](sindresorhus/get-port@v4.1.0...v4.2.0)

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

package.json

@@ -23,7 +23,7 @@
     "eslint-plugin-node": "^8.0.0",
     "eslint-plugin-prettier": "^3.0.0",
     "execa": "^1.0.0",
-    "get-port": "^4.0.0",
+    "get-port": "^4.2.0",
     "prettier": "^1.16.4",
     "qunit": "~2.9.2",
     "qunit-eslint": "^2.0.0",

yarn.lock

@@ -611,9 +611,9 @@ functional-red-black-tree@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz#1b0ab3bd553b2a0d6399d29c0e3ea0b252078327"
 
-get-port@^4.0.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/get-port/-/get-port-4.1.0.tgz#93eb3d5552c197497d76e9c389a6ac9920e20192"
+get-port@^4.2.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/get-port/-/get-port-4.2.0.tgz#e37368b1e863b7629c43c5a323625f95cf24b119"
 
 get-stdin@^6.0.0:
   version "6.0.0"