refactor: support modern connectTimeoutMS option name

Author: mbroadst

lib/core/sdam/monitor.js

@@ -48,7 +48,11 @@ class Monitor extends EventEmitter {
     this.address = server.description.address;
     this.options = Object.freeze({
       connectTimeoutMS:
-        typeof options.connectionTimeout === 'number' ? options.connectionTimeout : 10000,
+        typeof options.connectionTimeout === 'number'
+          ? options.connectionTimeout
+          : typeof options.connectTimeoutMS === 'number'
+          ? options.connectTimeoutMS
+          : 10000,
       heartbeatFrequencyMS:
         typeof options.heartbeatFrequencyMS === 'number' ? options.heartbeatFrequencyMS : 10000,
       minHeartbeatFrequencyMS: