File encoding is wrong and I'm loosing the copyright symbol.

[ikemtz]

The output file encoding is wrong.

var assemblyInfo = require('gulp-dotnet-assembly-info');

  gulp.src('**/AssemblyInfo.cs')
    .pipe(assemblyInfo({ 
      copyright: 'Copyright 2017 © XXXX', 
    }))
    .pipe(gulp.dest('.'));

results in my assembly files having:

[assembly: AssemblyCopyright("Copyright 2017 � XXXX")]

[mikeobrien]

Thx for catching this! I'm not going to be able to handle this ATM as I'm pretty slammed. Would definitely be open to a PR if you were interested tho.