fix(query): don't treat projection with just $slice as inclusive

Fix #5737

Author: vkarpov15

lib/query.js

@@ -3839,17 +3839,12 @@ Query.prototype.selectedInclusively = function selectedInclusively() {
 
   for (var i = 0; i < keys.length; ++i) {
     var key = keys[i];
-    if (this._fields[key] === 0 || this._fields[key] === false) {
-      return false;
-    }
-    if (this._fields[key] &&
-        typeof this._fields[key] === 'object' &&
-        this._fields[key].$meta) {
-      return false;
+    if (typeof this._fields[key] !== 'object' && !!this._fields[key]) {
+      return true;
     }
   }
 
-  return true;
+  return false;
 };
 
 /**