bump plotly to 2.34.0 (#442)

fix #315 (#325)

It seems there are no fake data points for statistic data (anymore?) so
I have removed fake data point handling for it.

Experimental workaround for small refresh_interval (#303)

Fixes accumulation of event listeners (#269)

set version in package.json when releasing

update version in package.json

updated plotly.js to v2.18.1 (#236)

Added support for plotly locales

Implement autorange_after_scroll (#227)

Implemented time string and dynamic relative time support for hours_t…

…o_show (#226)