Relax constraints on libzlib versions

[jchorl]

Hi!

I was curious if the requirement on libzlib >=1.3.1 is required. I noticed this on conda:

(base) root@fb9209cf6893:/# conda search -c bioconda pyfastx=2.2.0 --info
pyfastx 2.2.0 py310h397c9d8_0
-----------------------------                                                                             
file name   : pyfastx-2.2.0-py310h397c9d8_0.tar.bz2
name        : pyfastx                                
version     : 2.2.0                                  
build       : py310h397c9d8_0
build number: 0                                      
size        : 665 KB                                 
license     : MIT                                    
subdir      : linux-64    
url         : https://conda.anaconda.org/bioconda/linux-64/pyfastx-2.2.0-py310h397c9d8_0.tar.bz2
md5         : 5754ad9c33c369a6d8f2d675c7fba0c3
timestamp   : 2025-01-03 06:47:32 UTC                                                                     
dependencies:                                        
  - libgcc >=13                                      
  - libzlib >=1.3.1,<2.0a0 
  - python >=3.10,<3.11.0a0  
  - python_abi 3.10.* *_cp310

In isolation this is fine. Unfortunately many packages constrain libzlib to earlier versions. Arguably, all those packages should just upgrade, and I'm sure they will over time.

But it would also make things much easier if pyfastx wasn't so strict on versioning here.

Do you know if pyfastx actually uses any new functionality? Or could it support older versions of zlib too?

Thanks for consideration -