railsware#800: remove some casts in PTY

src/PTY.ts

@@ -9,6 +9,7 @@ interface ITerminal {
     write(data: string): void;
     resize(cols: number, rows: number): void;
     kill(signal?: string): void;
+    on(type: string, listener: (...args: any[]) => any): void;
 }
 
 export class PTY {
@@ -22,15 +23,15 @@ export class PTY {
 
         debug(`PTY: ${loginShell.executableName} ${JSON.stringify(shellArguments)}`);
 
-        this.terminal = pty.fork(loginShell.executableName, shellArguments, {
+        this.terminal = <any> pty.fork(loginShell.executableName, shellArguments, {
             cols: dimensions.columns,
             rows: dimensions.rows,
             cwd: env.PWD,
             env: env,
         });
 
-        (this.terminal as any).on("data", (data: string) => dataHandler(data));
-        (this.terminal as any).on("exit", (code: number) => exitHandler(code));
+        this.terminal.on("data", (data: string) => dataHandler(data));
+        this.terminal.on("exit", (code: number) => exitHandler(code));
     }
 
     write(data: string): void {