Update CHANGELOG.md for v0.3.0

Author: faultyserver

CHANGELOG.md

@@ -4,6 +4,35 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## v0.3.0
+
+### Additions
+- Many additions to the standard library (See #57. Thanks @bmulvihill, @minirop, @atuley, and @zkayser). `Integer`, `Float`, and `Enumerable` received big buffs, among other things.
+- Added a `Time` type and `Time#now` to get the current system time (see #85. Thanks, @bmulvihill).
+- Added the `extend` keyword for adding Module ancestors to the static scope of a Type (see #77. Thanks, @zkayser).
+- Added support for the Splat operator (`*`) for deconstructing objects into Lists of values (see #71).
+- Added support for Unary operators Not (`!`) and Negation (`-`) (see #52, #46. Thanks, @rainbru).
+- Allow any functor to be "captured" with the `&` unary operator (see #50).
+- Added support for anonymous functions using the `fn` keyword (see #47).
+- Object instantiations can accept captured functions as the block parameter (See #91). This keeps parity with regular method calls.
+- Added `__FILE__`, `__LINE__`, and `__DIR__` magic constants (see #90, #45. Thanks, @bmulvihill).
+
+### Bug Fixes
+- Properly maintain local scope overrides after rescuing an error (see #95).
+- Properly restore the value `self` after rescuing an error (see #65).
+- Fixed a bug with `List#==` where lists were incorrectly considered equal (see #89. Thanks, @bmulvihill).
+- Open angle brackets in Strings no longer cause a `ParseError` (see #80. Thanks, @bmulvihill).
+- Accessing/assigning non-existent elements in a List no longer raises an error (see #72. Thanks, @bmulvihill).
+
+### Miscellaneous
+- Adding parentheses after a `Var` will always force it to be a `Call`, even with no arguments (see #54. Thanks, @bmulvihill).
+
+### Infrastructure
+- Upgraded to Crystal 0.24.1 (see #99). This should improve the experience of developing Myst, particularly on macOS.
+- Fixed the fibonnaci example code to use the correct sequence numbers in the comments (see #55. Thanks, @minirop).
+
+
+
 ## v0.2.0
 
 ### Added