add the `exclude_regex` list option

README.rst

@@ -200,6 +200,12 @@ include_regex
   Only consider version strings that match the given regex. The whole string
   should match the regex. Be sure to use ``.*`` when you mean it!
 
+exclude_regex
+  Don't consider version strings that match the given regex. The whole string
+  should match the regex. Be sure to use ``.*`` when you mean it! This option
+  has higher precedence that ``include_regex``; that is, if matched by this
+  one, it's excluded even it's also matched by ``include_regex``.
+
 sort_version_key
   Sort the version string using this key function. Choose between
   ``parse_version`` and ``vercmp``. Default value is ``parse_version``.

nvchecker/get_version.py

@@ -47,6 +47,12 @@ def apply_list_options(versions, conf):
     versions = [x for x in versions
                 if pattern.fullmatch(x)]
 
+  pattern = conf.get('exclude_regex')
+  if pattern:
+    pattern = re.compile(pattern)
+    versions = [x for x in versions
+                if not pattern.fullmatch(x)]
+
   ignored = set(conf.get('ignored', '').split())
   if ignored:
     versions = [x for x in versions if x not in ignored]