Pattern that starting with a forward slash has incorrectly form in the deep filter

[mrmlnc]

Environment

• OS Version: Ubuntu 20
• Node.js Version: 14.4.0

Actual behavior

{ basePath: '/', entry: '//bin' }
{ basePath: '/', entry: '//boot' }
{ basePath: '/', entry: '//dev' }
{ basePath: '/', entry: '//etc' }

Expected behavior

{ basePath: '/', entry: '/bin' }
{ basePath: '/', entry: '/boot' }
{ basePath: '/', entry: '/dev' }
{ basePath: '/', entry: '/etc' }

Steps to reproduce

1. require('fast-glob').sync('/*')

Code sample

Nope.

[mrmlnc]

This is a regression between 2.x.x and 3.x.x.

[mrmlnc]

Works with a fresh install of the fast-glob package.