Fix captureGroup regression

Author: cpisciotta

Sources/XcbeautifyLib/Parser.swift

@@ -113,7 +113,7 @@ package class Parser {
             return nil
         }
 
-        let groups: [String] = line.captureGroup(with: captureGroupType.pattern)
+        let groups: [String] = captureGroupType.regex.captureGroups(for: line)
         guard let captureGroup = captureGroupType.init(groups: groups) else {
             assertionFailure()
             return nil
@@ -125,25 +125,3 @@ package class Parser {
         return captureGroup
     }
 }
-
-private extension String {
-    func captureGroup(with pattern: String) -> [String] {
-        do {
-            let regex = try NSRegularExpression(pattern: pattern, options: [.caseInsensitive])
-
-            let matches = regex.matches(in: self, range: NSRange(location: 0, length: utf16.count))
-            guard let match = matches.first else { return [] }
-
-            let lastRangeIndex = match.numberOfRanges - 1
-            guard lastRangeIndex >= 1 else { return [] }
-
-            return (1...lastRangeIndex).compactMap { index in
-                let capturedGroupIndex = match.range(at: index)
-                return substring(with: capturedGroupIndex)
-            }
-        } catch {
-            assertionFailure(error.localizedDescription)
-            return []
-        }
-    }
-}