allow value field name in combination with builder

[robamu]

Fixes #126

[danlehmann]

Thanks for the fix! Quick question: What if we made it a tuple struct instead? That .0 wouldn't clash with anything ever. Happy to merge as-is though.

Regardless, would you mind adding a note to the changelog?

[robamu]

What if we made it a tuple struct instead? That .0 wouldn't clash with anything ever.

Good idea. no renaming needed then. Might try this.

[robamu]

Okay, I pushed the change to use a unit tuple structure. however, I still need to mangle the value input argument o prevent nameclashes with a value generic..