Fixes

• Apply mark to all series in timeline, fixes #290
• Bump ECharts.js
• Add e_svg family of functions to fix #319
• Replaced magrittr pipe %>% to R native's |>.
• Fix e_map when used with no data, map was not displayed
• Fix e_flip_coords with boxplots (and other single column series) see #336
• Fix e_add applied to timeline, see 338