CompatHelper: bump compat for AbstractMCMC to 4, (keep existing compat) (#67)

Co-authored-by: CompatHelper Julia <[email protected]>

Author: github-actions[bot]

Project.toml

@@ -1,6 +1,6 @@
 name = "AdvancedMH"
 uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
-version = "0.6.6"
+version = "0.6.7"
 
 [deps]
 AbstractMCMC = "80f14c24-f653-4e6a-9b94-39d6b0f70001"
@@ -9,7 +9,7 @@ Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 
 [compat]
-AbstractMCMC = "2, 3.0"
+AbstractMCMC = "2, 3.0, 4"
 Distributions = "0.20, 0.21, 0.22, 0.23, 0.24, 0.25"
 Requires = "1"
 julia = "1"