fixed market making path bug, upgraded sdk to 0.0.3

ts/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@project-serum/serum-dev-tools",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "description": "developer tooling suite for building on serum",
   "repository": {
     "type": "git",

ts/src/dex.ts

@@ -255,7 +255,7 @@ export class Dex {
     owner: FileKeypair,
     opts: MarketMakerOpts,
   ): ChildProcess {
-    const child = fork("./src/scripts/marketMaker", null, {
+    const child = fork(`${__dirname}/scripts/marketMaker`, null, {
       detached: true,
       stdio: ["pipe", 0, 0, "ipc"],
     });