Adds TS typedefs so typed projects can inference

index.d.ts

@@ -0,0 +1,12 @@
+
+export function MovingAverage (timespan:number): MovingAverage
+export interface MovingAverage {
+  variance: () => number
+  movingAverage: () => number
+
+  deviation: () => number
+  forecast: () => number
+
+  push: (time: number, value: number) => void
+}
+export = MovingAverage

package.json

@@ -3,6 +3,7 @@
   "version": "1.0.0",
   "description": "Exponential Moving Average",
   "main": "index.js",
+  "types": "index.d.ts",
   "scripts": {
     "test": "npm run lint && npm run test:node",
     "test:node": "node tests/moving_average.js",