chore(deps-dev): bump eslint-config-prettier from 6.3.0 to 6.4.0

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 6.3.0 to 6.4.0.
- [Release notes](https://github.com/prettier/eslint-config-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-config-prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/eslint-config-prettier@v6.3.0...v6.4.0)

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

package.json

@@ -100,7 +100,7 @@
     "@typescript-eslint/parser": "^2.0.0",
     "awesome-typescript-loader": "^5.2.1",
     "eslint": "^6.4.0",
-    "eslint-config-prettier": "^6.3.0",
+    "eslint-config-prettier": "^6.4.0",
     "eslint-plugin-prettier": "^3.1.0",
     "esm": "^3.2.25",
     "prettier": "^1.18.2",

yarn.lock

@@ -6744,10 +6744,10 @@ escope@^3.6.0:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
-eslint-config-prettier@^6.3.0:
-  version "6.3.0"
-  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-6.3.0.tgz#e73b48e59dc49d950843f3eb96d519e2248286a3"
-  integrity sha512-EWaGjlDAZRzVFveh2Jsglcere2KK5CJBhkNSa1xs3KfMUGdRiT7lG089eqPdvlzWHpAqaekubOsOMu8W8Yk71A==
+eslint-config-prettier@^6.4.0:
+  version "6.4.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-6.4.0.tgz#0a04f147e31d33c6c161b2dd0971418ac52d0477"
+  integrity sha512-YrKucoFdc7SEko5Sxe4r6ixqXPDP1tunGw91POeZTTRKItf/AMFYt/YLEQtZMkR2LVpAVhcAcZgcWpm1oGPW7w==
   dependencies:
     get-stdin "^6.0.0"