Add border-double

Author: adamwathan

__tests__/fixtures/tailwind-output-important.css

@@ -3196,6 +3196,10 @@ video {
   border-style: dotted !important;
 }
 
+.border-double {
+  border-style: double !important;
+}
+
 .border-none {
   border-style: none !important;
 }
@@ -10143,6 +10147,10 @@ video {
     border-style: dotted !important;
   }
 
+  .sm\:border-double {
+    border-style: double !important;
+  }
+
   .sm\:border-none {
     border-style: none !important;
   }
@@ -17091,6 +17099,10 @@ video {
     border-style: dotted !important;
   }
 
+  .md\:border-double {
+    border-style: double !important;
+  }
+
   .md\:border-none {
     border-style: none !important;
   }
@@ -24039,6 +24051,10 @@ video {
     border-style: dotted !important;
   }
 
+  .lg\:border-double {
+    border-style: double !important;
+  }
+
   .lg\:border-none {
     border-style: none !important;
   }
@@ -30987,6 +31003,10 @@ video {
     border-style: dotted !important;
   }
 
+  .xl\:border-double {
+    border-style: double !important;
+  }
+
   .xl\:border-none {
     border-style: none !important;
   }

__tests__/fixtures/tailwind-output.css

@@ -3196,6 +3196,10 @@ video {
   border-style: dotted;
 }
 
+.border-double {
+  border-style: double;
+}
+
 .border-none {
   border-style: none;
 }
@@ -10143,6 +10147,10 @@ video {
     border-style: dotted;
   }
 
+  .sm\:border-double {
+    border-style: double;
+  }
+
   .sm\:border-none {
     border-style: none;
   }
@@ -17091,6 +17099,10 @@ video {
     border-style: dotted;
   }
 
+  .md\:border-double {
+    border-style: double;
+  }
+
   .md\:border-none {
     border-style: none;
   }
@@ -24039,6 +24051,10 @@ video {
     border-style: dotted;
   }
 
+  .lg\:border-double {
+    border-style: double;
+  }
+
   .lg\:border-none {
     border-style: none;
   }
@@ -30987,6 +31003,10 @@ video {
     border-style: dotted;
   }
 
+  .xl\:border-double {
+    border-style: double;
+  }
+
   .xl\:border-none {
     border-style: none;
   }

src/plugins/borderStyle.js

@@ -11,6 +11,9 @@ export default function() {
         '.border-dotted': {
           'border-style': 'dotted',
         },
+        '.border-double': {
+          'border-style': 'double',
+        },
         '.border-none': {
           'border-style': 'none',
         },