2620e24b83d16bf0f2bfe360dee1e98b4be59ca5 [depends] boost: update to 1.70 (Sjors Provoost)
Pull request description:
Version [1.70](https://www.boost.org/users/history/version_1_70_0.html) is most recent.
Versions needed for:
* 1.66: #12557: fixes the single arm64 configuration ([06ee5b5](06ee5b54ef))
ACKs for commit 2620e2:
Tree-SHA512: 6e0174f1d92c2c24314c0689d4809e048914f8f42d17aa73799f5ee232169e0dd0ed71f5f973903c44c08309f2837c629c493f15e5c31ec6c7bd1daae5f3b25f