CompatHelper: bump compat for Optimisers to 0.4, (keep existing compat) (#171)

Co-authored-by: CompatHelper Julia <compathelper_noreply@julialang.org>

Author: github-actions[bot]

Project.toml

@@ -37,7 +37,7 @@ LogExpFunctions = "0.3"
 MacroTools = "0.5"
 NNlib = "0.8.14, 0.9"
 NaNMath = "1"
-Optimisers = "0.2.9, 0.3"
+Optimisers = "0.2.9, 0.3, 0.4"
 PDMats = "0.11"
 Printf = "1"
 Random = "1"