feat: update to stylelint v8 (#109)

* remove dead rules from tests

* Update stylelint peer dependency

Resolves #110.

Author: EthanRutherford

package.json

@@ -30,15 +30,15 @@
   ],
   "homepage": "https://github.com/JaKXz/stylelint-webpack-plugin#readme",
   "peerDependencies": {
-    "stylelint": "^7.7.0",
+    "stylelint": "^8.0.0",
     "webpack": "^3 || ^2 || ^2.2.0-rc.0 || ^2.1.0-beta.0 || ^1.13.2"
   },
   "dependencies": {
     "arrify": "^1.0.1",
     "minimatch": "^3.0.3",
     "object-assign": "^4.1.0",
     "ramda": "^0.24.1",
-    "stylelint": "^7.7.0"
+    "stylelint": "^8.0.0"
   },
   "devDependencies": {
     "chai": "^4.0.2",

test/.stylelintrc

@@ -1,7 +1,7 @@
 {
   "rules": {
     "at-rule-empty-line-before": [ "always", {
-      "except": [ "blockless-group", "first-nested" ],
+      "except": [ "blockless-after-blockless", "first-nested" ],
       "ignore": ["after-comment"],
     } ],
     "block-closing-brace-newline-after": "always",
@@ -45,7 +45,6 @@
     "max-empty-lines": 1,
     "media-feature-colon-space-after": "always",
     "media-feature-colon-space-before": "never",
-    "media-feature-no-missing-punctuation": true,
     "media-feature-parentheses-space-inside": "never",
     "media-feature-range-operator-space-after": "always",
     "media-feature-range-operator-space-before": "always",
@@ -57,9 +56,6 @@
     "no-missing-end-of-source-newline": true,
     "number-leading-zero": "always",
     "number-no-trailing-zeros": true,
-    "rule-non-nested-empty-line-before": [ "always-multi-line", {
-      "ignore": ["after-comment"],
-    } ],
     "selector-combinator-space-after": "always",
     "selector-combinator-space-before": "always",
     "selector-list-comma-newline-after": "always",