actual_block_size not available for GDAL >= 3

[ChristianBeilschmidt]

At #92, there is a change to

    /// Get actual block size (at the edges) when block size
    /// does not divide band size.
    #[cfg(all(major_ge_2, minor_ge_2))]
    pub fn actual_block_size(&self, offset: (isize, isize)) -> Result<(usize, usize)> {
        let mut block_size_x = 0;
        let mut block_size_y = 0;
        …

This means the function is gone at GDAL 3.0 or 3.1? I guess this can be fixed easily.

[jdroenner]

fixed in #95