FindANTLR: Fix version RegEx

The currently used RegEx only allowed for single-digit version components for
everything but the major version. Thus, when parsing e.g. the version 4.10.1,
only the part 4.1 would be matched and thus, the determined ANTLR version
would be wrong.

runtime/Cpp/cmake/FindANTLR.cmake

@@ -14,7 +14,7 @@ if(ANTLR_EXECUTABLE AND Java_JAVA_EXECUTABLE)
       OUTPUT_STRIP_TRAILING_WHITESPACE)
 
   if(ANTLR_COMMAND_RESULT EQUAL 0)
-    string(REGEX MATCH "Version [0-9]+(\\.[0-9])*" ANTLR_VERSION ${ANTLR_COMMAND_OUTPUT})
+    string(REGEX MATCH "Version [0-9]+(\\.[0-9]+)*" ANTLR_VERSION ${ANTLR_COMMAND_OUTPUT})
     string(REPLACE "Version " "" ANTLR_VERSION ${ANTLR_VERSION})
   else()
     message(