Add build script to acquire quine

- Add script to npm package

build.sh

@@ -0,0 +1 @@
+mblf wordFactList.mblf out.bf && sed '0,/\./s//ÿ/' out.bf > quine.bf

package.json

@@ -7,7 +7,7 @@
     "test": "test"
   },
   "scripts": {
-    "build": "mblf wordFactList.mblf out.bf",
+    "build": "./build.sh",
     "test": "node test/wordFactList.js"
   },
   "repository": {

test/wordFactList.js

@@ -2,6 +2,6 @@
 const assert = require('assert')
 const fs = require('fs')
 
-fs.readFile("out.bf", (_, output) => {
-  assert.equal(output, "<+[-<+]-.<<<<<<<[.>]")
+fs.readFile("quine.bf", (_, output) => {
+  assert.equal(output, "<+[-<+]-ÿ<<<<<<<[.>]")
 })