Dependency Bumps Q2 2023

[clux]

Some big releases recently that needs manual attention and was not handled by dependabot. Making an issue here to ensure we handle all of it

• hyper-rustls 0.23 -> 0.24 + rustls 0.20 -> 0.21. Bump rustls,hyper-rustls - for #1181 #1182
• pem 1 -> 2 -> 3 - delayed as requires MSRV bump to 1.67 (when ready; backout this change) -> finally done in Bump pem to 3 #1272
• syn 1 ->2 - failed in Update syn requirement from 1.0.80 to 2.0.10 #1169 and Update syn requirement from 1.0.80 to 2.0.2 #1165 - now doable with a darling upgrade (0.20) Update darling requirement from 0.14.0 to 0.20.0 #1213 via Upgrade syn to v2 TedDriggs/darling#226 - done in Upgrade darling and syn and rename #[kube(struct)] #1307
• k8s-openapi 0.18 - Bump k8s-openapi to 0.18.0 #1190
• base64 0.20 -> 0.21 - skipped in Update base64 requirement from 0.20.0 to 0.21.0 #1117 and now we have 3 copies in the tree 🙃 - pem 2 uses 0.21, as does the next k8s-openapi, tower-http does not - done in Bump base64 to 0.21 #1308
• serde_yaml 0.8 -> revisit serde_yaml 0.9 #980 - done in Bump serde_yaml to 0.9 #1188

EDIT: Core ones are done. Rest needs some time.

[clux]

Originally was going to do base64 0.21 in the 0.82 bump, but the condescension around their last release makes me want to wait to see for a while instead. rust-lang/cargo#11796 (comment)

[clux]

syn/darling can be upgraded as a unit if anyone wants to tackle it.

base64 have generally propagated to the ecosystem so nothing blocking the remains here afaikt.

opening this up in the hopes that someone wants to look at it, had enough toil for one week.