Refactor to avoid immediately invoked requires

Author: kgryte

lib/node_modules/@stdlib/assert/is-boolean/test/test.object.js

@@ -22,15 +22,15 @@
 
 var tape = require( 'tape' );
 var proxyquire = require( 'proxyquire' );
-var hasSymbols = require( '@stdlib/utils/detect-symbol-support' )();
-var hasToStringTag = require( '@stdlib/utils/detect-tostringtag-support' )();
+var hasSymbols = require( '@stdlib/utils/detect-symbol-support' );
+var hasToStringTag = require( '@stdlib/utils/detect-tostringtag-support' );
 var isBoolean = require( './../lib/object.js' );
 
 
 // VARIABLES //
 
 var opts = {
-	'skip': !hasSymbols
+	'skip': !hasSymbols()
 };
 
 
@@ -66,7 +66,7 @@ tape( 'if `Symbol.toStringTag` is supported, the function guards against objects
 		'toString': toString,
 		'valueOf': valueOf
 	};
-	if ( hasToStringTag ) {
+	if ( hasToStringTag() ) {
 		mock[ Symbol.toStringTag ] = 'Boolean';
 	}
 	t.equal( isBoolean( mock ), false, 'returns false' );