Prepare changelog for 0.8.3.

Changelog.md

@@ -1,17 +1,13 @@
-### 0.8.3 (unreleased)
+### 0.8.3 (2021-03-23)
 
 Important Bugfixes:
  * Optimizer: Fix bug on incorrect caching of Keccak-256 hashes.
 
-Language Features:
-
-
 Compiler Features:
  * Command Line Interface: Drop experimental support for ``--machine evm15``.
  * Optimizer: Try to move ``and`` with constant inside ``or`` to improve storage writes of small types.
  * Optimizer: Replace multiplications and divisions with powers of two by shifts.
 
-
 Bugfixes:
  * AST Import: For constructors, a public visibility is ignored during importing.
  * Error Reporter: Fix handling of carriage return.
@@ -27,7 +23,6 @@ AST Changes:
  * ModifierInvocation: Add ``kind`` field which can be ``modifierInvocation`` or ``baseConstructorSpecifier``.
 
 
-
 ### 0.8.2 (2021-03-02)
 
 Compiler Features:

docs/bugs_by_version.json

@@ -1481,5 +1481,9 @@
             "KeccakCaching"
         ],
         "released": "2021-03-02"
+    },
+    "0.8.3": {
+        "bugs": [],
+        "released": "2021-03-23"
     }
 }