shell: add options to exec

src/test/shell-test.js

@@ -53,24 +53,24 @@ describe('shell', function () {
     });
 
     it('execSync a valid shell program', function (done) {
-        shell.exec('test', 'ls -l | wc -c', function (error) {
+        shell.exec('test', 'ls -l | wc -c', {}, function (error) {
             done(error);
         });
     });
 
     it('execSync a valid shell program (promises)', async function () {
-        await shell.promises.exec('test', 'ls -l | wc -c');
+        await shell.promises.exec('test', 'ls -l | wc -c', {});
     });
 
     it('execSync throws for invalid program', function (done) {
-        shell.exec('test', 'cannotexist', function (error) {
+        shell.exec('test', 'cannotexist', {}, function (error) {
             expect(error).to.be.ok();
             done();
         });
     });
 
     it('execSync throws for failed program', function (done) {
-        shell.exec('test', 'false', function (error) {
+        shell.exec('test', 'false', {}, function (error) {
             expect(error).to.be.ok();
             done();
         });