CompatHelper: add new compat entry for DocumenterMermaid at version 0.2 for package docs, (keep existing compat) (#932)

Co-authored-by: CompatHelper Julia <[email protected]>
Co-authored-by: Sven Berger <[email protected]>
Co-authored-by: Erik Faulhaber <[email protected]>

Author: 4 people

docs/Project.toml

@@ -11,6 +11,7 @@ Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 Asciicast = "0.1.3"
 Documenter = "1"
 DocumenterCitations = "1"
+DocumenterMermaid = "0.2"
 Literate = "2"
 OrdinaryDiffEq = "6"
 Plots = "1"