Update to [email protected]

[ulyssa]

This is a WIP update to use a newer version of the matrix-sdk. Several notes:

• I still need a solution for migrating keys from the sled store into sqlite, so this only works on new logins
• This required bumping the MSRV to 1.70, so anyone still using 1.67 will need to update
• The sqlite store is now stored under $XDG_DATA_HOME/iamb/profiles/$PROFILE/sqlite instead of under $XDG_CONFIG_HOME/iamb/profiles/$PROFILE/matrix like the sled store was, as discussed in #iamb-users:0x.badd.cafe a couple months back

[ulyssa]

I cross-compiled some ARM binaries for gamingjones223 in #iamb-users. I'm posting them here in case anyone else wants to try them out:

• iamb-armv7-linux.gz
• iamb-aarch64-linux.gz