Update Crashlytics.

External/iOS/Crashlytics.framework/Headers/CLSStackFrame.h

@@ -26,6 +26,7 @@ NS_ASSUME_NONNULL_BEGIN
 + (instancetype)stackFrameWithSymbol:(NSString *)symbol;
 
 @property (nonatomic, copy, nullable) NSString *symbol;
+@property (nonatomic, copy, nullable) NSString *rawSymbol;
 @property (nonatomic, copy, nullable) NSString *library;
 @property (nonatomic, copy, nullable) NSString *fileName;
 @property (nonatomic, assign) uint32_t lineNumber;

External/iOS/Crashlytics.framework/Headers/Crashlytics.h

@@ -18,7 +18,10 @@ NS_ASSUME_NONNULL_BEGIN
 @protocol CrashlyticsDelegate;
 
 /**
- *  Crashlytics. Handles configuration and initialization of Crashlytics.
+ * Crashlytics. Handles configuration and initialization of Crashlytics.
+ *
+ * Note: The Crashlytics class cannot be subclassed. If this is causing you pain for
+ * testing, we suggest using either a wrapper class or a protocol extension.
  */
 @interface Crashlytics : NSObject