CHANGELOG: prepare for v0.2.0

Author: mvdan

CHANGELOG.md

@@ -1,5 +1,36 @@
 # Changelog
 
+## [0.2.0] - 2021-11-??
+
+This is gofumpt's second major release, based on Go 1.17's gofmt.
+The jump from Go 1.15's gofmt should bring a mild speed-up,
+as walking directories with `filepath.WalkDir` uses fewer syscalls.
+
+gofumports is now removed, after being deprecated in [0.1.0].
+Its main purpose was IDE integration; it is now recommended to use gopls,
+which in turn implements goimports and supports gofumpt natively.
+IDEs which don't integrate with gopls (such as GoLand) implement goimports too,
+so it is safe to use gofumpt as their "format on save" command.
+See the [installation instructions](https://github.com/mvdan/gofumpt#Installation)
+for more details.
+
+The following [formatting rules](https://github.com/mvdan/gofumpt#Added-rules) are added:
+
+* Composite literals should not have leading or trailing empty lines
+* No empty lines following an assignment operator
+* Functions using an empty line for readability should use a `) {` line instead
+* Remove unnecessary empty lines from interfaces
+
+Finally, the following changes are made to the gofumpt tool:
+
+* Initial support for Go 1.18's type parameters is added
+* The `-r` flag is removed in favor of `gofmt -r`
+* The `-s` flag is removed as it is always enabled
+* Vendor directories are skipped unless given as explicit arguments
+* The added rules are not applied to generated Go files
+* The `format` Go API now also applies the `gofmt -s` simplification
+* Add support for `//gofumpt:diagnose` comments
+
 ## [0.1.1] - 2021-03-11
 
 This bugfix release backports fixes for a few issues:
@@ -31,5 +62,6 @@ those building programs with gofumpt.
 Finally, this release adds the `-version` flag, to print the tool's own version.
 The flag will work for "master" builds too.
 
+[0.2.0]: https://github.com/mvdan/gofumpt/releases/tag/v0.2.0
 [0.1.1]: https://github.com/mvdan/gofumpt/releases/tag/v0.1.1
 [0.1.0]: https://github.com/mvdan/gofumpt/releases/tag/v0.1.0