update requirements.txt and pyproject.toml. python3.8 is no longer su…

…pported (due to xarray), and keep cdflib and pycdfpp (temporary fix need to replace cdflib by pycdfpp everywhere)

pyproject.toml

@@ -27,15 +27,16 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Topic :: Scientific/Engineering",
     "Topic :: Scientific/Engineering :: Physics",
 ]
 dependencies = [
+    "cdflib>=1.0.4",
     "geopack>=1.0.9",
+    "importlib-metadata>=6.8.0",
     "matplotlib>=3.5.2",
     "numba>=0.54.1",
     "numpy>=1.20.3,<1.25.0",
@@ -47,7 +48,7 @@ dependencies = [
     "tqdm>=4.62.3",
     "xarray>=0.20.1",
 ]
-requires-python = ">=3.8,<3.12"
+requires-python = ">=3.9,<3.12"
 
 [project.optional-dependencies]
 dev = ["black", "pip-tools"]

requirements.txt

@@ -4,6 +4,8 @@
 #
 #    pip-compile --output-file=requirements.txt pyproject.toml
 #
+cdflib==1.2.3
+    # via pyrfu (pyproject.toml)
 certifi==2023.7.22
     # via requests
 charset-normalizer==3.1.0
@@ -18,6 +20,8 @@ geopack==1.0.10
     # via pyrfu (pyproject.toml)
 idna==3.4
     # via requests
+importlib-metadata==6.8.0
+    # via pyrfu (pyproject.toml)
 kiwisolver==1.4.4
     # via matplotlib
 llvmlite==0.40.0
@@ -28,6 +32,7 @@ numba==0.57.0
     # via pyrfu (pyproject.toml)
 numpy==1.24.3
     # via
+    #   cdflib
     #   contourpy
     #   geopack
     #   matplotlib
@@ -76,3 +81,5 @@ urllib3==2.0.7
     # via requests
 xarray==2023.9.0
     # via pyrfu (pyproject.toml)
+zipp==3.17.0
+    # via importlib-metadata