Bump brace-expansion from 1.1.16 to 1.1.21 in /examples/20 - #134

Changed pages include:

• index.html - view
• 404.html - view
• caveats.html - view
• config.html - view
• development.html - view
• guides.html - view
• install.html - view
• support.html - view
• team.html - view
• v/index.html - view

There are more changes not included in the list