Fix: dots are allowed again in string constants

Author: SundermannC

uvl/UVLLexer.g4

@@ -71,7 +71,7 @@ DOT: '.';
 ID_NOT_STRICT: '"'~[\r\n".]+'"';
 ID_STRICT: [a-zA-Z]([a-zA-Z0-9_#§%?\\'äüöß;])*;
 
-STRING: '\''~[\r\n'.]+'\'';
+STRING: '\''~[\r\n']+'\'';
 
 SKIP_: ( SPACES | COMMENT) -> skip;