Fix: Downgrade optimize-css-assets-webpack-plugin package (#819)

NOTE:
⚠️ For webpack v3 or below please use optimize-css-assets-webpack-plugin@3.2.0. The optimize-css-assets-webpack-plugin@4.0.0 version and above supports webpack v4.

package.json

@@ -73,7 +73,7 @@
     "node-noop": "^1.0.0",
     "node-sass": "^4.7.2",
     "nsp": "^3.2.1",
-    "optimize-css-assets-webpack-plugin": "^4.0.2",
+    "optimize-css-assets-webpack-plugin": "^3.2.0",
     "phantomjs-prebuilt": "^2.1.16",
     "postcss-loader": "^2.0.9",
     "postcss-sass": "^0.3.0",

yarn.lock

@@ -2494,7 +2494,7 @@ cssnano-cli@^1.0.5:
     read-file-stdin "^0.2.0"
     write-file-stdout "0.0.2"
 
-cssnano@^3.0.0, cssnano@^3.10.0:
+cssnano@^3.0.0, cssnano@^3.10.0, cssnano@^3.4.0:
   version "3.10.0"
   resolved "https://registry.yarnpkg.com/cssnano/-/cssnano-3.10.0.tgz#4f38f6cea2b9b17fa01490f23f1dc68ea65c1c38"
   dependencies:
@@ -5356,12 +5356,12 @@ known-css-properties@^0.6.0:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/known-css-properties/-/known-css-properties-0.6.1.tgz#31b5123ad03d8d1a3f36bd4155459c981173478b"
 
-last-call-webpack-plugin@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/last-call-webpack-plugin/-/last-call-webpack-plugin-3.0.0.tgz#9742df0e10e3cf46e5c0381c2de90d3a7a2d7555"
+last-call-webpack-plugin@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/last-call-webpack-plugin/-/last-call-webpack-plugin-2.1.2.tgz#ad80c6e310998294d2ed2180a68e9589e4768c44"
   dependencies:
-    lodash "^4.17.5"
-    webpack-sources "^1.1.0"
+    lodash "^4.17.4"
+    webpack-sources "^1.0.1"
 
 lazy-cache@^1.0.3:
   version "1.0.4"
@@ -6571,12 +6571,12 @@ optimist@^0.6.1, optimist@~0.6.1:
     minimist "~0.0.1"
     wordwrap "~0.0.2"
 
-optimize-css-assets-webpack-plugin@^4.0.2:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/optimize-css-assets-webpack-plugin/-/optimize-css-assets-webpack-plugin-4.0.2.tgz#813d511d20fe5d9a605458441ed97074d79c1122"
+optimize-css-assets-webpack-plugin@^3.2.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/optimize-css-assets-webpack-plugin/-/optimize-css-assets-webpack-plugin-3.2.0.tgz#09a40c4cefde1dd0142444a873c56aa29eb18e6f"
   dependencies:
-    cssnano "^3.10.0"
-    last-call-webpack-plugin "^3.0.0"
+    cssnano "^3.4.0"
+    last-call-webpack-plugin "^2.1.2"
 
 optionator@^0.8.1, optionator@^0.8.2:
   version "0.8.2"
@@ -9562,7 +9562,7 @@ webpack-log@^1.0.1:
     loglevelnext "^1.0.1"
     uuid "^3.1.0"
 
-webpack-sources@^1.0.1, webpack-sources@^1.1.0:
+webpack-sources@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.1.0.tgz#a101ebae59d6507354d71d8013950a3a8b7a5a54"
   dependencies: