v0.4.20 - Blazing Fast Payments

Implements a @TonyGiorgio's Hub Scorer, this is looking like it will increase payment reliabilty dramatically.

Some other highlights:

• Experimental anchor channels support
• Faster caching for bitcoin price
• Better support for different VSS backends
• Fixes fee rate being very low for channel closures

What's Changed

• Better bitcoin price cache by @benthecarman in #764
• Change to new storage url by @benthecarman in #765
• Fix units for fee estimation functions by @benthecarman in #768
• Add helper function for saving pending nwc invoices by @benthecarman in #770
• Don't persist NetworkGraph by @benthecarman in #771
• Prevent fee sniping in handle_spendable_outputs by @benthecarman in #766
• Fix compile for latest lnurl version by @benthecarman in #773
• Fix clippy issues by @benthecarman in #775
• Handle pending payments for redshifts by @benthecarman in #776
• Anchors support by @benthecarman in #762
• Unautheticated VSS by @benthecarman in #774
• VSS Updates by @benthecarman in #769
• Hub Scorer by @TonyGiorgio in #779
• Return proper error for bad url by @benthecarman in #778

Full Changelog: v0.4.19...v0.4.20