fix: can't set headerPattern from YAML configuration files

Expected Behavior

I use YAML configuration and try to set headerPattern like this:

extends:
  - '@commitlint/config-conventional'
parserPreset:
  parserOpts:
    headerPattern: '/^([^0-9]\w*)(?:\(([^0-9].*)\))?!?: (.*)$/' 

This should avoid scope starting with a digit:

$ echo 'fix(123): foo' | commitlint --verbose
⧗   input: fix(123): foo
✖   subject may not be empty [subject-empty]
✖   type may not be empty [type-empty]

✖   found 2 problems, 0 warnings
ⓘ   Get help: https://github.com/conventional-changelog/commitlint/#what-is-commitlint

Current Behavior

This load the headerPattern as a string instead of a regular expression:

$ commitlint --print-config | grep headerPattern
    parserOpts: { headerPattern: '/^([^0-9]\\w*)(?:\\(([^0-9].*)\\))?!?: (.*)$/' }

It looks like the scope starting with a digit is catch:

$ echo 'fix(123): foo' | commitlint --verbose
⧗   input: fix(123): foo
✖   subject may not be empty [subject-empty]
✖   type may not be empty [type-empty]

✖   found 2 problems, 0 warnings
ⓘ   Get help: https://github.com/conventional-changelog/commitlint/#what-is-commitlint

But it catch everything since headerPattern is not a regex:

echo 'fix(bar): foo' | commitlint --verbose
⧗   input: fix(bar): foo
✖   subject may not be empty [subject-empty]
✖   type may not be empty [type-empty]

✖   found 2 problems, 0 warnings
ⓘ   Get help: https://github.com/conventional-changelog/commitlint/#what-is-commitlint

Affected packages

• cli
• core
• prompt
• config-angular

Possible Solution

The pattern options should be converted to regular expression.

Steps to Reproduce

1. define the following configuration `.commitlintrc.yaml`
   
   extends:
     - '@commitlint/config-conventional'
   parserPreset:
     parserOpts:
       headerPattern: '/^([^0-9]\w*)(?:\(([^0-9].*)\))?!?: (.*)$/'
   
2. execute the following command which should fail: `echo 'fix(123): foo' | commitlint --verbose`
3. execute the following command which should pass: `echo 'fix(bar): foo' | commitlint --verbose`

Context

Note that replacing the .commitlintrc.yaml with the following commitlint.config.js is working:

module.exports = {
    extends: ['@commitlint/config-conventional'],
    parserPreset: {
        parserOpts: {
            headerPattern: /^([^0-9]\w*)(?:\(([^0-9].*)\))?!?: (.*)$/,
        }
    }
};

commitlint --version

@commitlint/cli@14.4.0

git --version

2.38.2

node --version

v19.3.0