chore(deps-dev): bump webpack-cli from 3.3.0 to 3.3.4 (reactstrap#1534)

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.0 to 3.3.4.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-cli@v.3.3.0...v3.3.4)

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

yarn.lock

@@ -9768,10 +9768,10 @@ preserve@^0.2.0:
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
   integrity sha1-gV7R9uvGWSb4ZbMQwHE7yzMVzks=
 
-prettier@^1.14.2:
-  version "1.16.4"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.16.4.tgz#73e37e73e018ad2db9c76742e2647e21790c9717"
-  integrity sha512-ZzWuos7TI5CKUeQAtFd6Zhm2s6EpAD/ZLApIhsF9pRvRtM1RFo61dM/4MSRUA0SuLugA/zgrZD8m0BaY46Og7g==
+prettier@^1.14.2, prettier@^1.17.0:
+  version "1.18.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.2.tgz#6823e7c5900017b4bd3acf46fe9ac4b4d7bda9ea"
+  integrity sha512-OeHeMc0JhFE9idD4ZdtNibzY0+TPHSpSSb9h8FqtP+YnoZZ1sl8Vc9b1sasjfymH3SonAF4QcA2+mzHPhMvIiw==
 
 pretty-bytes@^4.0.2:
   version "4.0.2"
@@ -12316,9 +12316,9 @@ webidl-conversions@^4.0.2:
   integrity sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==
 
 webpack-cli@^3.1.2:
-  version "3.3.0"
-  resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.3.0.tgz#55c8a74cae1e88117f9dda3a801c7272e93ca318"
-  integrity sha512-t1M7G4z5FhHKJ92WRKwZ1rtvi7rHc0NZoZRbSkol0YKl4HvcC8+DsmGDmK7MmZxHSAetHagiOsjOB6MmzC2TUw==
+  version "3.3.4"
+  resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.3.4.tgz#de27e281c48a897b8c219cb093e261d5f6afe44a"
+  integrity sha512-ubJGQEKMtBSpT+LiL5hXvn2GIOWiRWItR1DGUqJRhwRBeGhpRXjvF5f0erqdRJLErkfqS5/Ldkkedh4AL5Q1ZQ==
   dependencies:
     chalk "^2.4.1"
     cross-spawn "^6.0.5"
@@ -12328,6 +12328,7 @@ webpack-cli@^3.1.2:
     import-local "^2.0.0"
     interpret "^1.1.0"
     loader-utils "^1.1.0"
+    prettier "^1.17.0"
     supports-color "^5.5.0"
     v8-compile-cache "^2.0.2"
     yargs "^12.0.5"