1.0.10

• fix path filling oddities when spanGaps was used with leading or trailing null data. (#253)
  • this includes the removal of the spanGaps' function signature (a minor breaking change to an uncommon api)
• fix an init bug by setting default y scales (#252)
• perf optimizations for mousemove & legend display
  • don't re-calc date values on setCursor if cursor.idx didn't change
  • tzDate is expensive to do on mousemove. add fast path for Etc/UTC (since there's less involved for DST & timezone logic) (#252 (comment))