v2.19.0

Added

• Add label attribute to shapes [#6454],
  with thanks to the Volkswagen Center of Excellence for Battery Systems for sponsoring development!
• Add labelalias to various axes namely cartesian, gl3d, polar, smith, ternary, carpet,
  indicator and colorbar [#6481],
  this feature was anonymously sponsored: thank you to our sponsor!

Changed

• Upgrade is-mobile dependency [#6517]

Fixed

• Avoid overlap of point and axis hover labels for hovermode: 'x'|'y' [#6442],
  with thanks to @dagroe for the contribution!