feat(keys): add Product Hunt bindings

add bindings for producthunt.com, including:
- view product
-	view product (external)
- upvote product

actions.js

@@ -165,6 +165,14 @@ actions.hn.collapseNextComment = () => {
   }
 }
 
+// ProductHunt
+// -----------
+actions.ph = {}
+actions.ph.openExternal = () => {
+  Hints.create("ul[class^='postsList_'] > li > div[class^='item_']", p =>
+    tabOpenLink(p.querySelector("div[class^='meta_'] > div[class^='actions_'] > div[class^='minorActions_'] > a:nth-child(1)").href))
+}
+
 // Dribbble
 // --------
 actions.dr = {}

keys.js

@@ -361,6 +361,24 @@ const maps = {
     },
   ],
 
+  "producthunt.com": [
+    {
+      alias:       "a",
+      description: "View product (external)",
+      callback:    actions.ph.openExternal,
+    },
+    {
+      alias:       "v",
+      description: "View product",
+      callback:    actions.createHint("ul[class^='postsList_'] > li > div[class^='item_'] > a"),
+    },
+    {
+      alias:       "s",
+      description: "Upvote product",
+      callback:    actions.createHint("button[data-test='vote-button']"),
+    },
+  ],
+
   "dribbble.com": [
     {
       alias:       "s",