Upgrade to postcss 8

CHANGELOG.md

@@ -13,6 +13,13 @@
 ### Dependency updates
 
 - Removed `html-webpack-plugin` because it's not used anymore ([@lowiebenoot](https://github.com/lowiebenoot) in [#1346])
+- [Breaking] `postcss` from `7.0.17` to `8.2.0` ([@lowiebenoot](https://github.com/lowiebenoot) in [#1360]). This removes support for Node 11 and 13.
+- [Breaking] `postcss-cli` from `7.0.0` to `8.3.0` ([@lowiebenoot](https://github.com/lowiebenoot) in [#1360]).
+- [Breaking] `postcss-loader` from `3.0.0` to `4.1.0` ([@lowiebenoot](https://github.com/lowiebenoot) in [#1360]).
+- [Breaking] `postcss-import` from `12.0.1` to `13.0.0` ([@lowiebenoot](https://github.com/lowiebenoot) in [#1360]).
+- [Breaking] `postcss-mixins` from `6.2.1` to `7.0.1` ([@lowiebenoot](https://github.com/lowiebenoot) in [#1360]).
+- [Breaking] `postcss-nested` from `4.1.2` to `5.0.3` ([@lowiebenoot](https://github.com/lowiebenoot) in [#1360]).
+- [Breaking] `postcss-reporter` from `6.0.1` to `7.0.2` ([@lowiebenoot](https://github.com/lowiebenoot) in [#1360]).
 
 ## [1.0.11] - 2020-11-23
 

package.json

@@ -41,7 +41,7 @@
     "lodash.throttle": "^4.1.1",
     "lodash.without": "^4.4.0",
     "luxon": "^1.2.1",
-    "postcss-cli": "^7.0.0",
+    "postcss-cli": "^8.3.0",
     "prop-types": "^15.5.9",
     "react": "^16.3.1",
     "react-day-picker": "^7.4.8",
@@ -92,17 +92,17 @@
     "image-webpack-loader": "^6.0.0",
     "json-loader": "^0.5.4",
     "moment": "^2.22.2",
-    "postcss": "^7.0.17",
+    "postcss": "^8.2.0",
     "postcss-color-function": "^4.1.0",
     "postcss-custom-media": "^7.0.8",
     "postcss-each": "^0.10.0",
-    "postcss-import": "^12.0.1",
-    "postcss-loader": "^3.0.0",
-    "postcss-mixins": "^6.2.1",
-    "postcss-nested": "^4.1.2",
+    "postcss-import": "^13.0.0",
+    "postcss-loader": "^4.1.0",
+    "postcss-mixins": "^7.0.1",
+    "postcss-nested": "^5.0.3",
     "postcss-preset-env": "^6.7.0",
     "postcss-pseudoelements": "^5.0.0",
-    "postcss-reporter": "^6.0.1",
+    "postcss-reporter": "^7.0.2",
     "prettier": "2.2.1",
     "pretty-quick": "2.0.1",
     "proptypes": "^1.1.0",
@@ -123,7 +123,7 @@
   "main": "cjs/index.js",
   "module": "es/index.js",
   "engines": {
-    "node": ">=10.13.0"
+    "node": "^10.13 || ^12 || >=14"
   },
   "repository": {
     "type": "git",