switch to ptm_pipeline version of spectrum_io

pyproject.toml

@@ -30,7 +30,7 @@ mokapot = ">=0.9.1,<0.11.0"
 numpy = ">=1.20,<1.25"
 seaborn = ">=0.12.2,<0.14.0"
 spectrum-fundamentals = ">=0.7.8,<0.8.0"
-spectrum-io = ">=0.6.4,<0.7.0"
+spectrum-io = { git = "https://github.com/wilhelm-lab/spectrum_io.git", branch = "features/ptm_pipeline" }
 picked_group_fdr = ">=0.7.1"
 
 #dlomix = {extras = ["rltl-report", "wandb"], url="https://github.com/wilhelm-lab/dlomix/tarball/feature/bmpc", optional = true}