Compile error

Hi sorry if this is something trivial i'm new to zig :)
My Zig:
```
❯ zig version  
0.9.1
```
I get this error when using your lib:

```
/zigo/dependencies/zig-postgres/src/postgres.zig:77:60: error: unused loop index capture
                        inline for (struct_fields) |field, index| {
```
Do i have to set some flags to ignore that error?