Pin to current version due to upcoming change

Pin to current version due to upcoming change

diff --git a/.discourse-compatibility b/.discourse-compatibility
new file mode 100644
index 0000000..2491433
--- /dev/null
+++ b/.discourse-compatibility
@@ -0,0 +1,2 @@
+2.6.0.beta4: v1.0
+2.6.0.beta3: 9be0d88905735ed519c0df01195cd145e4b71fc1
\ No newline at end of file

GitHub sha: 2c1632b5