chore: lockfile maintenance

yarn.lock

@@ -1477,6 +1477,10 @@ agentkeepalive@^2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/agentkeepalive/-/agentkeepalive-2.2.0.tgz#c5d1bd4b129008f1163f236f86e5faea2026e2ef"
 
+ajv-errors@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/ajv-errors/-/ajv-errors-1.0.0.tgz#ecf021fa108fd17dfb5e6b383f2dd233e31ffc59"
+
 ajv-keywords@^2.1.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-2.1.1.tgz#617997fc5f60576894c435f940d819e135b80762"
@@ -6279,12 +6283,12 @@ min-document@^2.19.0:
   dependencies:
     dom-walk "^0.1.0"
 
-mini-css-extract-plugin@^0.4.1:
-  version "0.4.1"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.4.1.tgz#d2bcf77bb2596b8e4bd9257e43d3f9164c2e86cb"
+mini-css-extract-plugin@0.4.4:
+  version "0.4.4"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.4.4.tgz#c10410a004951bd3cedac1da69053940fccb625d"
   dependencies:
-    "@webpack-contrib/schema-utils" "^1.0.0-beta.0"
     loader-utils "^1.1.0"
+    schema-utils "^1.0.0"
     webpack-sources "^1.1.0"
 
 minimalistic-assert@^1.0.0, minimalistic-assert@^1.0.1:
@@ -7993,6 +7997,14 @@ schema-utils@^0.4.0, schema-utils@^0.4.2, schema-utils@^0.4.3, schema-utils@^0.4
     ajv "^6.1.0"
     ajv-keywords "^3.1.0"
 
+schema-utils@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-1.0.0.tgz#0b79a93204d7b600d4b2850d1f66c2a34951c770"
+  dependencies:
+    ajv "^6.1.0"
+    ajv-errors "^1.0.0"
+    ajv-keywords "^3.1.0"
+
 section-matter@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/section-matter/-/section-matter-1.0.0.tgz#e9041953506780ec01d59f292a19c7b850b84167"