nightly-2021-07-16

Changes since nightly-2021-07-14:

Full commit log

• a8d599a fix: typo
• 7374b9b chore: update webserver demo
• eef413c chore: unused binding in FromToJson
• c7f5fd6 fix: missing interpolation in trace message
• 8d616e0 doc: fix categoryParenthesizer documentation