Expected Behavior

running npm ls with @commitlint/cli installed should exit zero, meaning that there are no unsatisfied peer dependencies in the dependency tree.

Current Behavior

npm ls reports an unsatisfied peer dependency on typescript:

npm ERR! peer dep missing: typescript@>=2.7, required by [email protected]

npm ls ts-node shows that the requirement is pulled in by @endemolshinegroup/cosmiconfig-typescript-loader:

  └─┬ @commitlint/[email protected]
    └─┬ @commitlint/[email protected]
      └─┬ @endemolshinegroup/[email protected]
        └── [email protected] 

Affected packages

• cli
• core
• prompt
• config-angular

Possible Solution

either make @endemolshinegroup/cosmiconfig-typescript-loader an optional peer dependency or define typescript as a direct dependency of the cli package in order to satisfy the peer requirement.

Steps to Reproduce (for bugs)

1. npm install @commitlint/cli -D
2. npm ls

Context

i use commitlint in many projects that are not typescript projects, so i do not want to define typescript as a direct dependency in those projects to satisfy a peer requirement of commitlint.

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