Merge pull request #77 from Photoroom/ben/hotfix

[hotfix] Image size buckets

Merge pull request #73 from Photoroom/ben/tighter_ci

[WIP] slightly maddening random segfault on img.Close()

Merge pull request #72 from Photoroom/ben/deep_copy_prior_to_release

[hotfix] Race condition on the buffer release

Merge pull request #71 from Photoroom/ben/1.18_pypi_builds_jeez

[chore] Reverting back to go 1.18 for gopy  speed, no more mmap

Merge pull request #70 from Photoroom/ben/better_memory_handling

[core] Release vips image when done, remove GC work

Merge pull request #69 from Photoroom/ben/gc_often

[nit] Force frequent GC

Merge pull request #68 from Photoroom/ben/pypi_pkg_back_to_1.18.1

[chore] Build package with 1.22, 1.23 is still slow

Merge pull request #67 from Photoroom/ben/vips_no_tmp

vips: no tmp files

Merge pull request #59 from Photoroom/ben/bits_bytes

[hotfix] bits and bytes disagreeing

Merge pull request #59 from Photoroom/ben/bits_bytes

[hotfix] bits and bytes disagreeing