Update Codemirror fetch to HTTPS, up dependencies, recompile

[ClashTheBunny]

Fixed a few things that have changed over the years:

• Any java newer than 8 needs :jvm-opts for xml.
• I updated all of the dependencies to the latest versions
• I included an exclusions for datomic-free's version of guava
• I recompiled it
• Codemirror needs to be fetched over https

[schalkwijk]

@ClashTheBunny, thank you for this! Pity it hasn't gotten merged in to the main repo, but it was enough to get me unblocked.