Send SDK version info (#26)

This is intended primarily to allow the backend to warn about critical
updates

Fixes #5

Author: Firehed

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@snapauth/sdk",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "SnapAuth JS/TS SDK",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/SDK.ts

@@ -1,3 +1,6 @@
+// This constant is set by webpack during the build process
+declare var VERSION: string
+
 import {
   base64URLToArrayBuffer,
   arrayBufferToBase64URL,
@@ -154,6 +157,7 @@ class SDK {
       Accept: 'application/json',
       'Content-type': 'application/json',
       Authorization: `Basic ${btoa(this.apiKey + ':')}`,
+      'X-SDK': `js/${VERSION}`,
     })
 
     const request = new Request(this.host + path, {

webpack.config.js

@@ -1,4 +1,5 @@
 const path = require('path')
+const webpack = require('webpack')
 
 module.exports = {
   entry: './src/index.ts',
@@ -10,6 +11,11 @@ module.exports = {
     library: 'SnapAuth',
     libraryTarget: 'umd',
   },
+  plugins: [
+    new webpack.DefinePlugin({
+      VERSION: JSON.stringify(require('./package.json').version),
+    }),
+  ],
   module: {
     rules: [
       {