Update dependency diff to v4.0.4 (#420)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -52,7 +52,7 @@
     "@unibeautify/ugly-samples": "0.2.10",
     "array-flatten": "2.1.2",
     "csscomb": "4.3.0",
-    "diff": "4.0.2",
+    "diff": "4.0.4",
     "eslint": "4.19.1",
     "eslint-plugin-react": "7.37.5",
     "fs-extra": "8.1.0",

yarn.lock

@@ -1265,10 +1265,10 @@ del@^2.0.2:
     pinkie-promise "^2.0.0"
     rimraf "^2.2.8"
 
-diff@4.0.2:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.2.tgz#60f3aecb89d5fae520c11aa19efc2bb982aade7d"
-  integrity sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==
+diff@4.0.4:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.4.tgz#7a6dbfda325f25f07517e9b518f897c08332e07d"
+  integrity sha512-X07nttJQkwkfKfvTPG/KSnE2OMdcUCao6+eXF3wmnIQRn2aPAHH3VxDbDOdegkd6JbPsXqShpvEOHfAT+nCNwQ==
 
 diff@^4.0.1:
   version "4.0.1"