update changelog and PR template (#244)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,7 +1,3 @@
----
-Name: Pull Request
-About: Provide information about the proposed changes
----
 # Pull Request type
 
 <!-- Check the [contributing guide](../../CONTRIBUTING.md) -->

CHANGELOG.md

@@ -2,40 +2,52 @@
 
 All notable changes to this project will be documented in this file.
 
-## Next release
-[Compare](https://github.com/availproject/avail/compare/v1.6.4...HEAD)
-
-#### Added
-#### Changed
-#### Fixed
-
-## v1.6.4
-[Compare](https://github.com/availproject/avail/compare/v1.6.4...v1.6.3)
-
-#### Added
-- Switch to new api for commitment generation, improved performances.
-- Substrate upgraded to [1.0.0](https://github.com/paritytech/polkadot/releases/tag/v1.0.0).
-- Import process block verification ignores "Own" blocks.
-- Support utility pallet for data submission.
-- Added script to benchmark.
-- Added changelog, issue template, contributing guide, security policy, release template.
-- Added new flag `--unsafe-da-sync` to sync without building commitment.
-- Added CI for try-runtime / benchmarking.
-
-#### Changed
-- Improved benchmarking.
-- Increase data submission transaction max size to 512kb.
-- Now only one port is specified for http and ws endpoints.
-- Improved code organization.
-- Updated chainspecs.
-- Added defaults to pallets.
-- Adjusted weight ratio for operational class.
-- Updated weights to v2 syntax.
-- Improved RPC casing.
-
-#### Fixed
-- Fixed CI memory issues.
-- Fixed CodeCov.
-
-#### Removed
-- Removed `rs-merkle` and use only `binary-merkle-tree`
+# Next release
+- [Compare](https://github.com/availproject/avail/compare/v1.7.0...HEAD)
+
+## Added
+## Changed
+## Fixed
+
+# v1.7.0
+- [Compare](https://github.com/availproject/avail/compare/v1.7.0...v1.6.3)
+### Binary Upgrade Priority 
+❗️❗️High: This is a **high-priority** release, and you must upgrade **as soon as possible**.
+
+Runtime version: **12**
+
+## Changes
+### Runtime
+#### API breaking changes
+- 🗑️ Removed Democracy module - part of new Governance change
+- 🗑️ Removed Council module - part of new Governance change
+- 🗑️ Removed Elections module - part of new Governance change
+- 🗑️ Removed Uncles from Authorship module - part of Substrate v1.0.0 upgrade
+- ✅ HTTP and WS now use the same port (9944)
+- 👓 Error changes: https://pastebin.com/raw/4MAifbNU
+- 👓 Event changes: https://pastebin.com/raw/kEWJCnHv
+- 👓 Call changes: https://pastebin.com/raw/B6SZChd0
+
+#### API non-breaking changes
+- ✅ Updated our Substrate dependencies to version v1.0.0 - part of Substrate v1.0.0 upgrade
+- ✅ Updated transaction weights with more realistic values
+- ✅ Updated weight ratio for operational class
+- ✅ Improved the performance of commitment generation
+- 🆕 Added support for data submission TX to be executed via utility module TXs.
+- 🆕 Increased data submission transaction max size to 512kb
+- 🆕 Added Mandate module - part of new Governance change
+
+### Binary
+#### Breaking changes
+- ✅ Updated binary code to be compatible with Substrate v1.0.0 - part of Substrate v1.0.0 upgrade  
+- 🆕 Added Kate, Biryani and Dymension  chain specification to the node itself. You can access them via the following flags: `--chain kate`; `--chain biryani` and `--chain dymension`
+- 🆕 Import process block verification ignores "Own" blocks.
+
+#### Non-breaking changes
+- 🆕 ❗️Added a new flag `--unsafe-da-sync` to sync without building commitments
+
+### Misc
+- 🗑️ Removed code related to `rs-merkle` library
+- ✅ Updated benchmarks to V2 syntax
+- 🆕 Added CI scripts for try-runtime and benchmarking 
+- 🆕 Added changelog, issue template, contributing guide, security policy, release template.