fix: Call generate on custom step parameters

[JohnGrisham]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our contributor guidelines.
• Tests for the changes have been added (for bug fixes / features)
• Documentation has been added or updated where needed.

PR Type

What kind of change does this PR introduce?

• Bug fix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

more details

What issues are resolved by this PR?

• Bug: Parameters with typeof steps are not generated correctly #161

Describe the new behavior.

Description
When passing custom step parameters to a job within a workflow the commands get generated incorrectly. For example when trying to pass commands coming from an orb, like so:

pre_lint: [composer, 'test', typecheck],

Before the change:

- mindful/lint-and-unit-test:
          pre_lint:
            - name: mindful/composer
              parameters:
                environment_id: << pipeline.parameters.deployment_type >>
                instance_id: << pipeline.parameters.instance_type >>
            - test
            - parameters:
                name: Typecheck
                command: yarn run typecheck

After the change:

- mindful/lint-and-unit-test:
          pre_lint:
            - mindful/composer:
                environment_id: << pipeline.parameters.deployment_type >>
                instance_id: << pipeline.parameters.instance_type >>
            - test
            - run:
                name: Typecheck
                command: yarn run typecheck

Does this PR introduce a breaking change?

• Yes
• No

Other information

More information (optional)

The linked issue is more of a general description but I believe it applies here too. If a new issue needs to be opened I can do that as well.

[JohnGrisham]

@bear Tagging you since you approved the last couple of PRs. I don't know who needs to look at this, so if someone else needs to be tagged please tag them instead.

[JohnGrisham]

@brivu @KyleTryon I'm not sure who to tag on this or what the state of the project is. Please redirect me to a project maintainer if I've tagged the wrong people.

[KyleTryon]

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