cleanup deps and export d.ts typings

package.json

@@ -10,7 +10,6 @@
     "bit-buffer": "icewind1991/bit-buffer#readBitStream",
     "clone": "^2.1.0",
     "minimist": "1.1.x",
-    "smart-buffer": "^1.0.1",
     "typedarray-to-buffer": "^3.1.2"
   },
   "devDependencies": {

src/Demo.ts

@@ -28,7 +28,7 @@ export class Demo {
 	}
 }
 
-class StreamDemo {
+export class StreamDemo {
 	stream: Stream;
 
 	constructor(nodeStream: Stream) {

tsconfig.json

@@ -9,6 +9,7 @@
 		"target": "ES5",
 		"outDir": "build",
 		"rootDir": "src",
+		"declaration": true,
 		"strictNullChecks": true
 	}
 }