CHANGELOG: finish v0.2.0 draft

Mention two more bugfixes. Not the initial Go 1.17 support just yet,
because coincidentally it broke in the past 24h due to upstream changes.

Also tweak some of the other wording to be clearer.

CHANGELOG.md

@@ -2,19 +2,23 @@
 
 ## Unreleased
 
+## [0.2.0] - 2021-04-08
+
 This release of Garble drops support for Go 1.15.x, which is necessary for some
 of the enhancements below:
 
-* `garble test` allows running Go tests built with obfuscation
-* `garble reverse` allows de-obfuscating output like stack traces
+* New: `garble test` allows running Go tests built with obfuscation
+* New: `garble reverse` allows de-obfuscating output like stack traces
 * Names of functions implemented in assembly are now obfuscated
 * `GOPRIVATE=*` now works with packages like `crypto/tls` and `embed`
+* `garble build` can now be used with many main packages at once
+* `-literals` is more robust and now works on all of `std`
 
 The README is also overhauled to be more helpful to first-time users.
 
 Known bugs:
 
-* obfuscating the standard library with `GOPRIVATE=*` is not well supported yet
+* obfuscating the entire standard library with `GOPRIVATE=*` is not well supported yet
 
 ## [0.1.0] - 2021-03-05
 
@@ -35,4 +39,5 @@ Known bugs:
 * obfuscating the standard library with `GOPRIVATE=*` is not well supported yet
 * `garble test` is temporarily disabled, as it is currently broken
 
+[0.2.0]: https://github.com/burrowers/garble/releases/tag/v0.2.0
 [0.1.0]: https://github.com/burrowers/garble/releases/tag/v0.1.0