test: use execFile in CLI tests to avoid shell word-splitting for paths with spaces

Author: WillyEverGreen

lib/node_modules/@stdlib/_tools/benchmarks/browser-build/test/test.cli.js

@@ -22,6 +22,7 @@
 
 var resolve = require( 'path' ).resolve;
 var exec = require( 'child_process' ).exec;
+var execFile = require( 'child_process' ).execFile;
 var tape = require( 'tape' );
 var IS_BROWSER = require( '@stdlib/assert/is-browser' );
 var IS_WINDOWS = require( '@stdlib/assert/is-windows' );
@@ -62,7 +63,7 @@ tape( 'when invoked with a `--help` flag, the command-line interface prints the
 		'--help'
 	];
 
-	exec( cmd.join( ' ' ), done );
+	execFile( cmd[ 0 ], cmd.slice( 1 ), done );
 
 	function done( error, stdout, stderr ) {
 		if ( error ) {
@@ -88,7 +89,7 @@ tape( 'when invoked with a `-h` flag, the command-line interface prints the help
 		'-h'
 	];
 
-	exec( cmd.join( ' ' ), done );
+	execFile( cmd[ 0 ], cmd.slice( 1 ), done );
 
 	function done( error, stdout, stderr ) {
 		if ( error ) {
@@ -108,7 +109,7 @@ tape( 'when invoked with a `--version` flag, the command-line interface prints t
 		'--version'
 	];
 
-	exec( cmd.join( ' ' ), done );
+	execFile( cmd[ 0 ], cmd.slice( 1 ), done );
 
 	function done( error, stdout, stderr ) {
 		if ( error ) {
@@ -128,7 +129,7 @@ tape( 'when invoked with a `-V` flag, the command-line interface prints the vers
 		'-V'
 	];
 
-	exec( cmd.join( ' ' ), done );
+	execFile( cmd[ 0 ], cmd.slice( 1 ), done );
 
 	function done( error, stdout, stderr ) {
 		if ( error ) {