Support adding puncutations to text for node-addon-api (#876)

scripts/node-addon-api/lib/punctuation.js

@@ -0,0 +1,15 @@
+const addon = require('./addon.js');
+
+class Punctuation {
+  constructor(config) {
+    this.handle = addon.createOfflinePunctuation(config);
+    this.config = config;
+  }
+  addPunct(text) {
+    return addon.offlinePunctuationAddPunct(this.handle, text);
+  }
+}
+
+module.exports = {
+  Punctuation,
+}