fix: allow tilde in conda version constraints (#1033)

See conda package match specifications:


https://docs.conda.io/projects/conda-build/en/25.1.x/resources/package-spec.html#package-match-specifications

This syntax has also been around for a bit, I can already see it in the
`24.1.x` docs.

bioconda_utils/lint/check_syntax.py

@@ -23,7 +23,7 @@ def check_recipe(self, recipe):
         for section in ('build', 'run', 'host'):
             check_paths.append(f'requirements/{section}')
 
-        constraints = re.compile("(.*?)([!<=>].*)")
+        constraints = re.compile("(.*?)([!~<=>].*)")
         for path in check_paths:
             for n, spec in enumerate(recipe.get(path, [])):
                 has_constraints = constraints.search(spec)
@@ -37,7 +37,7 @@ def fix(self, _message, _data):
         for section in ('build', 'run', 'host'):
             check_paths.append(f'requirements/{section}')
 
-        constraints = re.compile("(.*?)([!<=>].*)")
+        constraints = re.compile("(.*?)([!~<=>].*)")
         for path in check_paths:
             for spec in self.recipe.get(path, []):
                 has_constraints = constraints.search(spec)