Release 2.0.11.2.0

[gregorycoppola]

[2.0.11.2.0]

NOTE: This change resets the testnet. Users running a testnet node will need
to reset their chain states.

Added

• clarity-cli will now also print a serialized version of the resulting
  output from eval and execute commands. This serialization is in
  hexademical string format and supports integration with other tools. (Feat/clarity cli serialized output #2684)
• The creation of a Bitcoin wallet with BTC version > 0.19 is now supported
  on a private testnet. (Private local testnet support #2647)
• lcov-compatible coverage reporting has been added to clarity-cli for
  Clarity contract testing. (Add lcov compatible coverage reporting to clarity-cli #2592)
• The README.md file has new documentation about the release process. (Docs: adding release process to README.md #2726)

Changed

• This change resets the testnet. (Chore: reset testnet #2742)
• Caching has been added to speed up /v2/info responses. (Fix/2725 #2746)

Fixed

• PoX syncing will only look back to the reward cycle prior to divergence,
  instead of looking back over all history. This will speed up running a
  follower node. (Fix/2725 #2746)
• The UTXO staleness check is re-ordered so that it occurs before the RBF-limit
  check. This way, if stale UTXOs reached the "RBF limit" a miner will recover
  by resetting the UTXO cache. (Fix: #2644 reorder UTXO staleness and RBF-limit check #2694)
• Microblock events were being sent to the event observer when microblock data
  was received by a peer, but were not emitted if the node mined the
  microblocks itself. This made something like the private-testnet setup
  incapable of emitting microblock events. Microblock events are now sent
  even when self-mined. (fix: emit microblocks mined by the node itself, add microblock hashes #2653)
• A bug is fixed in the mocknet/helium miner that would lead to a panic if a
  burn block occurred without a sortition in it. (fix: logic bug in mocknet/helium miner #2710 #2711)
• A bug that caused problems syncing during a bitcoin reorg has been fixed
  (Bitcoin reorgs can impact run loop synchronization, stalling bitcoin downloads #2771).
• Syncing with the burnchain has been improved (Only consider target_block_height when relevant #2780).
• Documentation is fixed in cases where string and buffer types are allowed
  but not covered in the documentation. ([docs] Add some string-ascii and string-utf8 types to the docs #2676)

[gregorycoppola]

Note: This branch is a straight "git checkout -b" from develop with two modifications:

1. I bundled in a change adding two lines to the CHANGELOG.md to capture @lgalabru 's bug fixes:

- A bug that caused problems syncing during a bitcoin reorg has been fixed
  (#2771).
- Syncing with the burnchain has been improved (#2780).

2. I merged in master and resolved the only conflicts in favor of master. The conflicts were:

<<<<<<< HEAD
- [x] **Neon** is the first version of our public testnet, which shipped in Q2 2020. This testnet added SIP 003, and will be an open-membership public network, where participants will be able to validate and participate in mining testnet blocks.

- [x] **Argon** is the second version of our public testnet, which shipped in Q2 2020. This testnet improved on the stability of the Neon testnet.

- [x] **Krypton** is the third version of our public testnet, which incorporates a partial implementation of SIP 007. It allows developers to test a simple version of Stacking and PoX consensus.

- [x] **Xenon** is the upcoming version of our public testnet, which will run on the Bitcoin testnet. It will include SIP 006 and SIP 008, and will contain bugfixes and improvements to the implementation of SIP 007.

- [x] **Mainnet** is the fully functional version, that is estimated for Q4 2020.

See the [testnet website](https://testnet.blockstack.org) and ["when mainnet?" FAQ](https://github.com/blockstack/stacks/blob/master/whenmainnet.md) for details.
=======
- [x] **Xenon** is the Stacks 2 public testnet, which runs PoX against the Bitcoin testnet. It is the full implementation of the Stacks 2 blockchain, and should be considered a stable testnet for developing Clarity smart contracts. See the [testnet documentation](https://docs.stacks.co/understand-stacks/testnet) for more information on the public testnet.

- [x] **Mainnet** is the fully functional Stacks 2 blockchain, see the [Stacks overview](https://docs.stacks.co/understand-stacks/overview) for information on running a Stacks node, mining, stacking, and writing Clarity smart contracts.
>>>>>>> master

[pavitthrap]

The strategy suggested by the Stack Overflow post was actually flipped (since for them, their protected branch was not master).

But no worries, this is fine with me.

[blockstack-devops]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.