Added wrapper for OGR_L_SetFeature

[geohardtke]

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• I added an entry to CHANGES.md if knowledge of this change could be valuable to users.

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Hi, I tried to find a way to update the value of a field in a vector and couldn't find a way to achieve that. Maybe I missed something? If so, sorry. Otherwise here is a pull request that implements a wrapper for OGR_L_SetFeature.

It can be used as follows:

        let ds_options = DatasetOptions {
            open_flags: GdalOpenFlags::GDAL_OF_UPDATE,
            ..DatasetOptions::default()
        };
        let ds = Dataset::open_ex("three_layer_ds.s3db"), ds_options).unwrap();
        let mut layer = ds.layer(0).unwrap();
        let fids: Vec<u64> = layer.features().map(|f| f.fid().unwrap()).collect();
        let feature = layer.feature(fids[0]).unwrap();
        feature.set_field_integer("id", 1).ok();
        layer.set_feature(feature).ok();

[rmanoka]

This is a good API addition; thanks and apologies for the delay @geohardtke . Could you pls. fix the conflicts?

[rmanoka]

lgtm; will merge it in a couple days unless there are more suggestions.

[rmanoka]

bors r+

[bors]

Build succeeded:

• ci ubuntu-lts
• ci ubuntu-lts (--all-features)
• clippy