fix the abort controller check
fix the abort controller check

PR-URL: https://github.com/isaacs/node-lru-cache/pull/217
Credit: da39a3ee5e6b4b0d3255bfef95601890afd80709@agalatan
Close: #217
Reviewed-by: da39a3ee5e6b4b0d3255bfef95601890afd80709@bytemain

isaacs/node-lru-cache,isaacs/node-lru-cache