Bump to 1.6.0, update changelog (#122)

Author: sjakobi

prettyprinter/CHANGELOG.md

@@ -1,3 +1,19 @@
+# 1.6.0
+
+## Breaking changes
+
+- Fix `fuse`'s handling of annotated documents:
+  - Don't remove annotations on empty documents.
+  - Apply fusion within annotations.
+- Fix layouting of hard linebreaks with `Unbounded` page widths.
+
+## Non-breaking changes
+
+- Speed up `group` for documents containing linebreaks and previously
+  `group`ed documents.
+- Add debugging helpers in `Data.Text.Prettyprint.Doc.Internal.Debug`
+- Documentation improvements and fixes
+
 # 1.5.1
 
 - Removing trailing whitespace sometimes restored necessary whitespace in the

prettyprinter/prettyprinter.cabal

@@ -1,5 +1,5 @@
 name:                prettyprinter
-version:             1.5.1
+version:             1.6.0
 cabal-version:       >= 1.10
 category:            User Interfaces, Text
 synopsis:            A modern, easy to use, well-documented, extensible pretty-printer.