lib: use validator

Used the `validateArray()` validator for validation of an array for consistency.

Author: VoltrexKeyva

lib/internal/child_process.js

@@ -366,11 +366,8 @@ ChildProcess.prototype.spawn = function(options) {
     // Let child process know about opened IPC channel
     if (options.envPairs === undefined)
       options.envPairs = [];
-    else if (!ArrayIsArray(options.envPairs)) {
-      throw new ERR_INVALID_ARG_TYPE('options.envPairs',
-                                     'Array',
-                                     options.envPairs);
-    }
+    else
+      validateArray(options.envPairs, 'options.envPairs');
 
     ArrayPrototypePush(options.envPairs, `NODE_CHANNEL_FD=${ipcFd}`);
     ArrayPrototypePush(options.envPairs,
@@ -652,7 +649,8 @@ function setupChannel(target, channel, serializationMode) {
         }
       }
 
-      assert(ArrayIsArray(target._handleQueue));
+      validateArray(target._handleQueue, 'target._handleQueue');
+
       const queue = target._handleQueue;
       target._handleQueue = null;