feat: use type predicates for narrowing

Author: Planeshifter

lib/node_modules/@stdlib/assert/is-object-array/docs/types/index.d.ts

@@ -34,7 +34,7 @@
 * bool = isObjectArray( [ {}, '3.0' ] );
 * // returns false
 */
-declare function isObjectArray( value: any ): boolean;
+declare function isObjectArray( value: any ): value is ArrayLike<Object>;
 
 
 // EXPORTS //

lib/node_modules/@stdlib/assert/is-object/docs/types/index.d.ts

@@ -32,7 +32,7 @@
 * var bool = isObject( null );
 * // returns false
 */
-declare function isObject( value: any ): boolean;
+declare function isObject( value: any ): value is Object;
 
 
 // EXPORTS //

lib/node_modules/@stdlib/assert/is-odd/docs/types/index.d.ts

@@ -52,7 +52,7 @@ interface IsOdd {
 	* var bool = isOdd( null );
 	* // returns false
 	*/
-	( value: any ): boolean;
+	( value: any ): value is number | Number;
 
 	/**
 	* Tests if a value is a number primitive that is an odd number.
@@ -68,7 +68,7 @@ interface IsOdd {
 	* var bool = isOdd.isPrimitive( new Number( -5.0 ) );
 	* // returns false
 	*/
-	isPrimitive( value: any ): boolean;
+	isPrimitive( value: any ): value is number;
 
 	/**
 	* Tests if a value is a number object that is an odd number.
@@ -84,7 +84,7 @@ interface IsOdd {
 	* var bool = isOdd.isObject( new Number( 5.0 ) );
 	* // returns true
 	*/
-	isObject( value: any ): boolean;
+	isObject( value: any ): value is Number;
 }
 
 /**