Bump @nestjs/core from 6.8.0 to 6.8.4

Bumps [@nestjs/core](https://github.com/nestjs/nest) from 6.8.0 to 6.8.4.
- [Release notes](https://github.com/nestjs/nest/releases)
- [Commits](nestjs/nest@v6.8.0...v6.8.4)

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

yarn.lock

@@ -315,14 +315,14 @@
     uuid "3.3.3"
 
 "@nestjs/core@^6.2.4":
-  version "6.8.0"
-  resolved "https://registry.yarnpkg.com/@nestjs/core/-/core-6.8.0.tgz#5edb0f09e30f2acb1d4cb4e0f01ede6e39701cca"
-  integrity sha512-12KzKo2Veg0dde3U9++DD8tTrmQufsVhrg9yIvDoNR7rF4yimhf1Fm/KvjfBXy5WdbVKxPBmeULYm54hr0dQWw==
+  version "6.8.4"
+  resolved "https://registry.yarnpkg.com/@nestjs/core/-/core-6.8.4.tgz#a583f9b4fb38ad0e663c0b478902c7b7390d8b8d"
+  integrity sha512-q4bS5QMB0djkjxUs6PhcQaJAJdKgRF3672ohsQirL0jojik4jKJG8qxjTdgE6Ywvh9KdannLCDAxINOLg1L1vg==
   dependencies:
     "@nuxtjs/opencollective" "0.2.2"
     fast-safe-stringify "2.0.7"
     iterare "1.2.0"
-    object-hash "1.3.1"
+    object-hash "2.0.0"
     uuid "3.3.3"
 
 "@nestjs/testing@^6.2.4":
@@ -2724,10 +2724,10 @@ object-copy@^0.1.0:
     define-property "^0.2.5"
     kind-of "^3.0.3"
 
-object-hash@1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/object-hash/-/object-hash-1.3.1.tgz#fde452098a951cb145f039bb7d455449ddc126df"
-  integrity sha512-OSuu/pU4ENM9kmREg0BdNrUDIl1heYa4mBZacJc+vVWz4GtAwu7jO8s4AIt2aGRUTqxykpWzI3Oqnsm13tTMDA==
+object-hash@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/object-hash/-/object-hash-2.0.0.tgz#7c4cc341eb8b53367312a7c546142f00c9e0ea20"
+  integrity sha512-I7zGBH0rDKwVGeGZpZoFaDhIwvJa3l1CZE+8VchylXbInNiCj7sxxea9P5dTM4ftKR5//nrqxrdeGSTWL2VpBA==
 
 object-keys@^1.0.12:
   version "1.1.1"