[Misc]: bumping up francy-regex to 0.13.0, reverting changes in previ…

…ous commit since they now handle the previously failing case (#442)

guard/Cargo.toml

@@ -40,7 +40,7 @@ grep-matcher = "0.1.5"
 grep-regex = "0.1.9"
 unsafe-libyaml = "0.2.10"
 rstest = "0.15.0"
-fancy-regex = "0.12.0"
+fancy-regex = "0.13.0"
 indoc = "1.0.8"
 thiserror = "1.0.38"
 

guard/src/rules/parser.rs

@@ -257,41 +257,6 @@ fn parse_regex_inner(input: Span) -> IResult<Span, Value> {
 
         regex.push_str(fragment);
 
-        let mut stack = vec![];
-        let chars = regex.chars().collect::<Vec<_>>();
-
-        for (i, c) in chars.iter().enumerate() {
-            if c.is_control() {
-                return Err(nom::Err::Error(ParserError {
-                    context: "Could not parse regular expression".to_string(),
-                    kind: ErrorKind::RegexpMatch,
-                    span: input,
-                }));
-            }
-            if *c == '(' {
-                if i == 0 || *chars.get(i - 1).unwrap() != '\\' {
-                    stack.push(c);
-                }
-            } else if *c == ')'
-                && (i == 0 || *chars.get(i - 1).unwrap() != '\\')
-                && stack.pop().is_none()
-            {
-                return Err(nom::Err::Error(ParserError {
-                    context: "Could not parse regular expression".to_string(),
-                    kind: ErrorKind::RegexpMatch,
-                    span: input,
-                }));
-            }
-        }
-
-        if !stack.is_empty() {
-            return Err(nom::Err::Error(ParserError {
-                context: "Could not parse regular expression".to_string(),
-                kind: ErrorKind::RegexpMatch,
-                span: input,
-            }));
-        }
-
         return match Regex::try_from(regex.as_str()) {
             Ok(_) => Ok((remainder, Value::Regex(regex))),
             Err(e) => Err(nom::Err::Error(ParserError {