Only apply base url if not empty string

[christian-bromann]

Proposed changes

If someone has an empty string in their base url it would have cause WebdriverIO to throw an error:

   "TypeError [ERR_INVALID_URL]: Invalid URL:
     at onParseError (internal/url.js:256:9)
     at new URL (internal/url.js:332:5)
     at new URL (internal/url.js:329:22)
    at Browser.url (/xxxxx/node_modules/webdriverio/build/commands/browser/url.js:43:17)"

This patch ensure that the string is not empty.

Types of changes

• 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)
• Documentation update

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Further comments

refs #6460

Reviewers: @webdriverio/project-committers

[larryg01]

@christian-bromann will this be included in the latest update v7.1.2 ?

[christian-bromann]

No, it will be included in the upcoming release.

[larryg01]

Ok thank you. I need this before i can push out an update of my framework