test: add tests for Autosize constructor and properties#9485

gururaj1512 wants to merge 4 commits intostdlib-js:refactor/plotstdlib-js/stdlib:refactor/plotfrom

gururaj1512:refactor/plot-vega-autosize-ctor-testsgururaj1512/stdlib:refactor/plot-vega-autosize-ctor-testsCopy head branch name to clipboard