Fix background callback context serialisation for non-dict request args - #3817

Fix background callback context serialisation for non-dict request args#3817

T4rk1n merged 4 commits into

plotly:devplotly/dash:devfrom

i-murray:fix/background-callback-queryparams-serialisationi-murray/dash:fix/background-callback-queryparams-serialisationCopy head branch name to clipboard