feat: bump version to 6.0.0

Author: srghma

spago.yaml

@@ -3,7 +3,7 @@ package:
   description: Low-level interface for asynchronous variables
   publish:
     license: Apache-2.0
-    version: 5.0.0
+    version: 6.0.0
     location:
       githubOwner: purescript-contrib
       githubRepo: purescript-avar
@@ -26,3 +26,4 @@ workspace:
   extraPackages: {}
   packageSet:
     registry: 60.5.0
+version: 6.0.0