grunt-typescript watches wrong directory

[Coridyn]

When watch: true and a deep source directory grunt-typescript will watch the wrong directory.

e.g. with this task config:

typescript: {
    dev: {
        src: [
            'src/**/*.ts'
        ],
        dest: 'dist',
        options: {
            basePath: 'src',
            watch: true
        }
    },
}

And this source structure:

src/app.ts
src/nested/nested-file.ts
src/nested/deeper/deeper-file.ts

grunt-typescript will watch src/nested instead of the src/ directory

Here is an example project that shows the issue: https://github.com/Coridyn/grunt-typescript-debug/tree/debug/0.6.2-watch-path