Restrict zarr and tifffile versions (#237)

Tifffile's zarr integration doesn't support zarr 3, and we are using a tifffile feature that's been discontinued in the latest version. This change restricts those packages' versions to compatible ones, as provides in the installation instructions in the README and documentation.
labsyspharm · Feb 21, 2025 · f4f623c · f4f623c
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diff --git a/README.md b/README.md
@@ -105,7 +105,7 @@ conda activate ashlar
 
 In the activated environment, install dependencies and ashlar itself:
 ```bash
-conda install -y -c conda-forge numpy scipy matplotlib networkx scikit-image scikit-learn tifffile zarr pyjnius blessed
+conda install -y -c conda-forge numpy scipy matplotlib networkx scikit-image scikit-learn "tifffile<2025.2.18" "zarr<3" pyjnius blessed
 pip install ashlar
 ```
 

diff --git a/docs/instructions/installation.md b/docs/instructions/installation.md
@@ -34,7 +34,7 @@ conda activate ashlar
 
 In the activated environment, install dependencies and ashlar itself:
 ```bash
-conda install -y -c conda-forge numpy scipy matplotlib networkx scikit-image scikit-learn tifffile zarr pyjnius blessed
+conda install -y -c conda-forge numpy scipy matplotlib networkx scikit-image scikit-learn "tifffile<2025.2.18" "zarr<3" pyjnius blessed
 pip install ashlar
 ```