Release v0.12.0

[saubyk]

Major release rolling out Offers (BOLT12) functionality for C-Lightning users.
https://github.com/Ride-The-Lightning/RTL/releases/tag/v0.12.0

Please note that the offers functionality in this release has a critical dependency on upgrading to the latest release of C-Lightning-REST v0.6.1. Please ensure to upgrade to that version.

Release highlights below.

C-Lightning:

• Experimental feature control to enable Offers for C-Lightning users
• Create/Manage Offers
• Pay with Offers
• Bookmark paid offers for future payments
• Export offers to PDF for printing

LND:

• Compatibility fixes for version 0.14.1

Eclair:

• Compatibility fixed for version 0.6.2

Common enhancements:

• Event handling for invoice payment
• Updated button styles on modal windows

Other technical changes/improvements:

• Websocket support
• Password added as an environment variable
• RTL server migrated to TS
• Local database added

Minor bugs and UX issues. Complete list of issues addressed available here

RTL version compatibility matrix:

1. C-Lightning

• version 0.10.1
• Version 0.10.2

2. ECL

• version 0.6.1
• version 0.6.2

3. LND

• version 0.13.4
• version 0.14.1

4. Loop

• version 0.14.2
• version 0.15.0

Release contributors:
@ShahanaFarooqui
@diogorsergio
@violet360
@miketwenty1
@swedishfrenchpress
@bitbandi
@saubyk

[hazrulnizam]

Setup guide needs to be updated. Sample config file is no longer located in the docs folder, which does not exist under the main folder now.