Update changelog with changes so far

Signed-off-by: Sean Young <sean@mess.org>

CHANGELOG.md

@@ -2,6 +2,20 @@
 All notable changes to [Solang](https://github.com/hyperledger-labs/solang/)
 will be documented here.
 
+## [Unreleased]
+
+### Added
+- Added spl-token integration for Solana
+
+### Changed
+- The documentation has been re-arranged for readability.
+
+### Fixed
+- Fixed many parser issues. Now solang-parser parses all files in the
+  Ethereum Solidity test suite. First run
+  `git submodule update --init --recursive` to fetch the test files, and
+  then run the test with `cargo test --workspace`.
+
 ## [0.1.11]
 
 ### Added

README.md

@@ -131,7 +131,7 @@ Here is a brief description of what we envision for the next versions.
 | Milestone | Status      |
 | --------- |-------------|
 | Specify values as "1 sol" and "1e9 lamports" | In progress |
-| Solana SPL tokens compatibility | In progress |
+| Solana SPL tokens compatibility | Completed |
 
 ### V0.3