build(deps-dev): bump @types/webpack-merge from 4.1.4 to 4.1.5

Bumps [@types/webpack-merge](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/webpack-merge) from 4.1.4 to 4.1.5.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/webpack-merge)

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

package.json

@@ -128,7 +128,7 @@
  "@types/webpack": "^4.4.27",
  "@types/webpack-dev-middleware": "^2.0.1",
  "@types/webpack-hot-middleware": "^2.16.3",
- "@types/webpack-merge": "^4.1.4",
+ "@types/webpack-merge": "^4.1.5",
  "@typescript-eslint/eslint-plugin": "^1.6.0",
  "@typescript-eslint/parser": "^1.1.0",
  "asar": "^1.0.0",

yarn.lock

@@ -1178,10 +1178,10 @@
  "@types/connect" "*"
  "@types/webpack" "*"
 
-"@types/webpack-merge@^4.1.4":
- version "4.1.4"
- resolved "https://registry.yarnpkg.com/@types/webpack-merge/-/webpack-merge-4.1.4.tgz#48ed14b9f15919f966e7e00bb97615d4af13fe42"
- integrity sha512-aAMCQFhHAugvmjykIJlxjX1lqzw5V7j6t8fYeFkMvJN1ZhUDkMOY94/7UhQJTffGP0qnKxoVoQF2zm6DHfdVMw==
+"@types/webpack-merge@^4.1.5":
+ version "4.1.5"
+ resolved "https://registry.yarnpkg.com/@types/webpack-merge/-/webpack-merge-4.1.5.tgz#265fbee4810474860d0f4c17e0107032881eed47"
+ integrity sha512-cbDo592ljSHeaVe5Q39JKN6Z4vMhmo4+C3JbksOIg+kjhKQYN2keGN7dvr/i18+dughij98Qrsfn1mU9NgVoCA==
  dependencies:
  "@types/webpack" "*"