feat: add logic for eager-evaluation of unary, array and object literal

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---
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---

Author: Vinit-Pandit

lib/node_modules/@stdlib/repl/lib/eager_evaluator.js

@@ -65,12 +65,13 @@ var ANSI_RESET = ANSI_COLORS[ 'reset' ];
 * @returns {boolean} boolean indicating whether the node is side-effect-free
 */
 function traverse( node ) {
+	var properties;
 	var fname;
 	var i;
 	if ( !node ) {
 		return false;
 	}
-	if ( node.type === 'Literal' || node.type === 'Identifier' ) {
+	if ( node.type === 'Literal' || node.type === 'Identifier' || ( node.type === 'UnaryExpression' && node.operator !== 'delete' ) ) {
 		return true;
 	}
 	if ( node.type === 'BinaryExpression' ) {
@@ -96,6 +97,21 @@ function traverse( node ) {
 			}
 			return true;
 		}
+	} else if ( node.type === 'ArrayExpression' ) {
+		for ( i = 0; i < node.elements.length; i++ ) {
+			if ( !traverse( node.elements[ i ] ) ) {
+				return false;
+			}
+		}
+		return true;
+	} else if ( node.type === 'ObjectExpression' ) {
+		for ( i = 0; i < node.properties.length; i++ ) {
+			properties = node.properties;
+			if ( !traverse( properties[ i ].key ) || !traverse( properties[ i ].value ) ) {
+				return false;
+			}
+		}
+		return true;
 	}
 	return false;
 }