now-alpine + suppress a pkg warning (#277)

* explicitly list pkg targets (alpine is not in default list)

* suppress pkg warnings by adding 'may-exclude'

lib/get-files.js

@@ -39,7 +39,7 @@ async function npm(path, pkg, nowConfig = null, {
 
   // always include the "main" file
   if (pkg.main) {
-    search.push(require.resolve(resolve(path, pkg.main)))
+    search.push(require.resolve(resolve(path, pkg.main), 'may-exclude')) // pkg: may-exclude suppresses warnings
   }
 
   // compile list of ignored patterns and files

package.json

@@ -12,7 +12,7 @@
     "precommit": "npm run lint",
     "lint": "xo",
     "test": "npm run lint && ava",
-    "pack": "pkg . --out-dir packed"
+    "pack": "pkg . --out-dir packed -t node7-alpine-x64,node7-linux-x64,node7-macos-x64,node7-win-x64"
   },
   "pkg": {
     "scripts": [