Function transformFile

transformFile(
    file: string,
    options?: TransformOptions,
    asStream?: boolean,
): Promise<TransformResult>
transform css file
Parameters
- file: string
  url or path
- options: TransformOptions = {}
- asStream: boolean = false
  load file as stream
Returns Promise<TransformResult>
Throws
Error file not found

Example:
```
 import {transformFile} from '@tbela99/css-parser';

 // remote file
let result = await transformFile('https://docs.deno.com/styles.css');
console.log(result.code);

// local file
result = await transformFile('./css/styles.css');
console.log(result.code);
```
- Defined in node.ts:242