fix(robotlangserver): robot version string is incorrectly parsed if version has no patch

correct can't get namespace diagnostics ''>=' not supported between instances of 'NoneType' and 'int'' sometimes happens

closes:  #99

Author: d-biehl

robotcode/language_server/robotframework/utils/version.py

@@ -55,7 +55,7 @@ def s_to_i(s: Optional[str]) -> Optional[int]:
             return Version(
                 int(m.group("major")),
                 int(m.group("minor")),
-                s_to_i(m.group("patch")),
+                s_to_i(m.group("patch")) or 0,
                 m.group("pre_id"),
                 s_to_i(m.group("pre_number")),
                 s_to_i(m.group("dev")),
@@ -69,4 +69,4 @@ def s_to_i(s: Optional[str]) -> Optional[int]:
 
 
 if __name__ == "__main__":
-    print(get_robot_version() >= (4, 0))
+    print(get_robot_version())