Update Jbrowse2 to 4.0.3

[abretaud]

FOR CONTRIBUTOR:

• I have read the CONTRIBUTING.md document and this tool is appropriate for the tools-iuc repo.
• License permits unrestricted use (educational + commercial)
• This PR adds a new tool or tool collection
• This PR updates an existing tool or tool collection
• This PR does something else (explain below)

Changelog: https://github.com/GMOD/jbrowse-components/releases/tag/v4.0.3

[bgruening]

Output output: Composite file (config.json) of History item 3b3af5b927f9ed38 different than expected, difference:
History item 3b3af5b927f9ed38 different than expected, difference (using sim_size):
( /tmp/tmpnosuekfdconfig.json v. /tmp/tmp_uaambuzconfig.json )
Files /tmp/tmpnosuekfdconfig.json=11744b but /tmp/tmp_uaambuzconfig.json=10644b - compare by size (delta=0) failed

Not sure if comparing json by size is useful. Can we use the json asserts?

[abretaud]

Yeah, I was hoping for a quick easy update, but somehow it failed, I'll look into it