add webextension externs to firefox template

template/build.hxml

@@ -1,6 +1,7 @@
 -lib kiss
+-lib webextension-polyfill
 -cp src
 -dce full
 --main template.Main
 --js bin/main.js
--cmd zip -r template.zip . -x *.git* -x *.hxml -x *.zip -x src/\*
+-cmd zip -r template.zip . -x *.git* -x *.hxml -x *.zip -x src/\* -x node_modules/\*

template/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "template",
+  "version": "0.0.0",
+  "description": "A Firefox extension made with Kisslang",
+  "main": "index.js",
+  "scripts": {
+    "postinstall": "dts2hx --all"
+  },
+  "dependencies": {
+    "@types/webextension-polyfill": "^0.10.0"
+  },
+  "devDependencies": {
+    "dts2hx": "^0.19.0"
+  }
+}

template/test.sh

@@ -0,0 +1,7 @@
+#! /bin/bash
+
+if [ ! -d node_modules ]; then
+    $(haxelib libpath kiss)/build-scripts/dts2hx-externs/regenerate.sh
+fi
+
+haxe -D test build.hxml