Work around change in integer literal inference (swiftlang#798)

* Work around change in integer literal inference

Related to swiftlang/swift#78371,
but doesn't need to be reverted after that issue is fixed.

* Fix availability for capture tests

Sources/Exercises/Participants/HandWrittenParticipant.swift

@@ -60,7 +60,8 @@ private func graphemeBreakPropertyData(
   }
 
   // For testing our framework
-  if forceFailure, lower == Unicode.Scalar(0x07FD) {
+  let failureSigil = Unicode.Scalar(0x07FD as UInt32)!
+  if forceFailure, lower == failureSigil {
     return nil
   }
 

Sources/_StringProcessing/Regex/Match.swift

@@ -41,6 +41,8 @@ extension Regex.Match {
       from: anyRegexOutput.input
     )
     guard let output = typeErasedMatch as? Output else {
+      print(typeErasedMatch)
+      print(Output.self)
       fatalError("Internal error: existential cast failed")
     }
     return output

Tests/RegexBuilderTests/RegexDSLTests.swift

@@ -1845,8 +1845,8 @@ extension RegexDSLTests {
   }
 
   func testLabeledCaptures_labeledCapture() throws {
-    guard #available(macOS 13, *) else {
-      throw XCTSkip("Fix only exists on macOS 13")
+    guard #available(macOS 14.0, *) else {
+      throw XCTSkip("Fix only exists on macOS 14")
     }
     // The output type of a regex with a labeled capture is dropped.
     let dslWithLabeledCapture = Regex {
@@ -1884,8 +1884,8 @@ extension RegexDSLTests {
   }
 
   func testLabeledCaptures_bothCapture() throws {
-    guard #available(macOS 13, *) else {
-      throw XCTSkip("Fix only exists on macOS 13")
+    guard #available(macOS 14.0, *) else {
+      throw XCTSkip("Fix only exists on macOS 14")
     }
     // Only the output type of a regex with a labeled capture is dropped,
     // outputs of other regexes in the same DSL are concatenated.
@@ -1910,9 +1910,8 @@ extension RegexDSLTests {
   }
 
   func testLabeledCaptures_tooManyCapture() throws {
-    return
-    guard #available(macOS 13, *) else {
-      throw XCTSkip("Fix only exists on macOS 13")
+    guard #available(macOS 14.0, *) else {
+      throw XCTSkip("Fix only exists on macOS 14")
     }
     // The output type of a regex with too many captures is dropped.
     // "Too many" means the left and right output types would add up to >= 10.