fix: clearing slash prefixes before adding uriSegment within url builder's processPattern

[tomgobich]

Proposed changes

Fixes v6 issue 48, by stripping slashes prior to adding uriSegment within proccessPattern.

Changes this:

if (token.type === 0) {
  uriSegments.push(`${token.val}${token.end}`)
}

To this:

if (token.type === 0) {
  const value = token.val.startsWith('/') ? token.val.substring(1) : token.val
  uriSegments.push(`${value}${token.end}`)
}

Added two new tests as well to cover this noted issue within tests/router/url_builder.spec.ts:

• create url for a route by its name for the home path
• create url for a route by the handler name for the home path

Types of changes

What types of changes does your code introduce?

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have read the CONTRIBUTING doc
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works.
• I have added necessary documentation (if appropriate)

Further comments

Doesn't look like npm commit exists yet in the next branch, so I went ahead and just used git commit. If you need anything changed, just let me know 😊

[thetutlage]

Sorry, took a while as I was focusing on other stuff. Lemme merge it and then give it a run locally.

Thanks for taking out time