Pin older version of leaflet side by side

[jtmiclat]

Addresses issue raised in #1730

[martinfleis]

Do we know what is going on apart from that the latest version does not work? If it is a bug it should be fixed (either here or there), pinning is only a temporary solution.

[giswqs]

This is probably a JS issue as the ipyleaflet SplitMap control also has the same issue

jupyter-widgets/ipyleaflet#1066

[martinfleis]

Interesting. Are you able to pinpoint the source? If it is leaflet or the plugin and report it there? We can pin it here but we need to track the progress to unpin it once resolved in the upstream.

[giswqs]

It seems the leaflet-side-by-side plugin is the root cause.
digidem/leaflet-side-by-side#47

[giswqs]

Sent the wrong link. Should be this one: digidem/leaflet-side-by-side#47

[martinfleis]

Thanks for digging @giswqs!

[martinfleis]

Approving as a temporary fix until the upstream solution is released. Thanks!