Output pattern synonyms in Hoogle backend (#947)

* Output pattern synonyms in Hoogle backend

We were previously weren't outputting _any_ pattern synonyms, bundled or
not. Now, we output both.

Fixes #946.

* Update changelog

1 files changed, 2 insertions, 0 deletions

diff --git a/CHANGES.md b/CHANGES.md
index c1801716..7ed90cdc 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -4,6 +4,8 @@
 
  * Support type and data families in the LaTeX backend (#734)
 
+ * Support pattern synonyms in the Hoogle backend (#947)
+
 ## Changes in version 2.21.0
 
  * Overhaul handling of data declarations in XHTML and LaTeX. Adds support for