Merge branch '1.x' into 2.x

Author: jrfnl

.remarkrc

@@ -8,7 +8,14 @@
     ["remark-lint-linebreak-style", "unix"],
     ["remark-lint-link-title-style", "\""],
     ["remark-lint-ordered-list-marker-style", "."],
-    "remark-lint-no-dead-urls",
+    [
+        "remark-lint-no-dead-urls",
+        {
+            "skipUrlPatterns": [
+                "^https?://github\\.com/Yoast/PHPUnit-Polyfills/compare/[0-9\\.]+?\\.{3}[0-9\\.]+"
+            ]
+        }
+    ],
     "remark-lint-no-duplicate-definitions",
     "remark-lint-no-empty-url",
     "remark-lint-no-file-name-consecutive-dashes",