FlutterBuilder constructor
Creates a new instance of FlutterBuilder.
The verbose parameter allows to control the verbosity of the
command. If true, the flutter build command will be executed with
the --verbose flag and the output will be printed to the console.
If false, the command will be executed with the --quiet flag and
the output will be silent.
Implementation
FlutterBuilder(this.buildMode, {this.verbose = false});