Do not limit upper bound of versions

If future versions are incompatible, we can introduce a limit,
although more likely we will want to adapt anyway.

Author: dschwoerer

pyproject.toml

@@ -27,12 +27,12 @@ keywords = [
 ]
 requires-python = ">=3.10"
 dependencies = [
-    "boututils ~= 0.1.10",
+    "boututils >= 0.1",
     "numpy >= 1.24",
-    "sympy ~= 1.7",
-    "scipy ~= 1.10",
-    "matplotlib ~= 3.7",
-    "netCDF4 ~= 1.7",
+    "sympy >= 1.7",
+    "scipy >= 1.10",
+    "matplotlib >= 3.7",
+    "netCDF4 >= 1.7",
     "freeqdsk >= 0.4.0",
 ]
 dynamic = ["version"]