sanity_checks: accept dash in packages' version strings

Projects may use dashes ('-') in their version strings (for example,
taocpp-json use "-beta.N" for years) but it prevents accepting such
projecs in the wrapdb database.

As the string is splitted with rsplit(1), such version strings should
not cause a problem.

tools/sanity_checks.py

@@ -257,7 +257,7 @@ def test_releases(self):
                     t = f'{name}_{v}'
                     ver, rev = v.rsplit('-', 1)
                     with self.subTest(step='valid release name'):
-                        self.assertTrue(re.fullmatch('[a-z0-9._]+', ver))
+                        self.assertTrue(re.fullmatch('[a-z0-9._-]+', ver))
                         self.assertTrue(re.fullmatch('[0-9]+', rev))
                     if i == 0:
                         with self.subTest(step='check_source_url'):