fix(unity_process): createProject() now sets the right option

Author: toverux

src/unity_process.ts

@@ -132,7 +132,7 @@ export class UnityProcess {
      * Create an empty project at the given path.
      */
     public createProject(projectPath: string): this {
-        this.processOptions.projectPath = projectPath;
+        this.processOptions.createProject = projectPath;
 
         return this;
     }