Loosen dependency pins, add MANIFEST.in, update fallback version

- pytz: ~=2024.1 → >=2024.1
- platformdirs: ~=4.2.2 → >=4.2
- Add MANIFEST.in to exclude docs/notebooks/tests from sdist (173MB → 790KB)
- Update fallback_version to 0.4.0
- Use SPDX license string (fixes setuptools deprecation warning)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: a-fa

MANIFEST.in

@@ -0,0 +1,11 @@
+graft src
+include LICENSE README.md CHANGELOG.md pyproject.toml
+
+prune docs
+prune notebooks
+prune tests
+prune images
+prune .github
+prune .claude
+
+global-exclude *.pyc __pycache__ .DS_Store

pyproject.toml

@@ -9,14 +9,15 @@ dynamic = ["version"]
 description = "A modular nanopore data analysis package."
 readme = "README.md"
 requires-python = ">=3.10"
-license = {file = "LICENSE"}
+license = "GPL-3.0-only"
+license-files = ["LICENSE"]
 authors = [{name = "Ali Fallahi", email = "fallahi.a@northeastern.edu"}]
 dependencies = [
   "numpy>=2.0",
   "Cython>=3.0.11",
-  "pytz~=2024.1",
+  "pytz>=2024.1",
   "scipy>=1.14.1",
-  "platformdirs~=4.2.2",
+  "platformdirs>=4.2",
   "pyabf>=2.3.8",
   "pandas>=2.0",
 
@@ -29,4 +30,4 @@ panel = ["panel","bokeh-jupyter","ipympl","plotly","openpyxl"]
 [tool.setuptools_scm]
 write_to = "src/ionique/_version.py"
 # fall back version is for downloading git repo
-fallback_version = "0.3.0"
+fallback_version = "0.4.0"