fix: avoid BigInt literal in closeTo for runtime compat

Author: bheemreddy-samsara

lib/chai/core/assertions.js

@@ -3147,7 +3147,10 @@ function closeTo(expected, delta, msg) {
   }
   new Assertion(expected, flagMsg, ssfi, true).is.numeric;
 
-  const abs = (x) => (x < 0n ? -x : x);
+  // Avoid emitting BigInt literals in the runtime path; some JS engines
+  // (e.g., older Hermes builds on React Native) cannot parse `0n` and will
+  // fail at bundle load time. Use number math to keep closeTo compatible.
+  const abs = (x) => (x < 0 ? -x : x);
 
   // Used to round floating point number precision arithmetics
   // See: https://stackoverflow.com/a/3644302