Update dependency rollup-plugin-postcss to v1.6.2

package.json

@@ -44,7 +44,7 @@
     "rollup-plugin-babel": "4.0.0-beta.4",
     "rollup-plugin-copy-assets": "1.0.0",
     "rollup-plugin-node-resolve": "3.3.0",
-    "rollup-plugin-postcss": "1.6.1",
+    "rollup-plugin-postcss": "1.6.2",
     "rollup-plugin-serve": "0.4.2",
     "rollup-plugin-terser": "1.0.1",
     "rucksack-css": "1.0.2",

yarn.lock

@@ -4495,6 +4495,10 @@ p-locate@^2.0.0:
   dependencies:
     p-limit "^1.1.0"
 
+p-queue@^2.4.2:
+  version "2.4.2"
+  resolved "https://registry.yarnpkg.com/p-queue/-/p-queue-2.4.2.tgz#03609826682b743be9a22dba25051bd46724fc34"
+
 p-try@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-try/-/p-try-1.0.0.tgz#cbc79cdbaf8fd4228e13f621f2b1a237c1b207b3"
@@ -5739,16 +5743,17 @@ [email protected]:
     is-module "^1.0.0"
     resolve "^1.1.6"
 
-[email protected].1:
-  version "1.6.1"
-  resolved "https://registry.yarnpkg.com/rollup-plugin-postcss/-/rollup-plugin-postcss-1.6.1.tgz#8251104b9d9eedacbb56e87fb8fb9f226daaf716"
+[email protected].2:
+  version "1.6.2"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-postcss/-/rollup-plugin-postcss-1.6.2.tgz#f3422a56dab21bcb2e9b7182763733d4ff2c1b4c"
   dependencies:
     "@vue/component-compiler-utils" "^1.0.0"
     chalk "^2.0.0"
     concat-with-sourcemaps "^1.0.5"
     cssnano "^3.10.0"
     fs-extra "^5.0.0"
     import-cwd "^2.1.0"
+    p-queue "^2.4.2"
     pify "^3.0.0"
     postcss "^6.0.21"
     postcss-load-config "^1.2.0"