Add changelog

Author: adamliter

CHANGELOG.md

@@ -0,0 +1,18 @@
+<!-- -*- coding: utf-8; mode: markdown; fill-column: 72; -*- -->
+
+# Changelog
+
+## [Unreleased]
+
+## [1.0.0] – 2020-01-27
+
+### Added
+
+- Introduction
+- Section about bracket notation
+- Section about using `Overleaf` and `forest` to draw trees
+- Section about using `jsSyntaxTree` to draw trees
+- Section about using a word processor to draw trees
+- Section about using `TreeForm` to draw trees
+
+[1.0.0]: https://github.com/adamliter/latex-workshop/releases/tag/v1.0.0