Changes since v5.29.0

vega-functions

• make default vega format null as "null" (via #3926). (Thanks @kanitw & @domoritz )!

docs

• Add 4 new examples (via #3851). (Thanks @avatorl & @domoritz!)

monorepo

• Deploy editor preview (via #3925, #3931). (Thanks @hydrosquall!)
• Bump all vega-* deps in topological order to eliminate version mismatches within the monorepo (via #3932). (Thanks @lsh!)