bump compat for DocStringExtensions

Author: j-fu

Project.toml

@@ -1,7 +1,7 @@
 name = "ExtendableSparse"
 uuid = "95c220a8-a1cf-11e9-0c77-dbfce5f500b3"
 authors = ["Juergen Fuhrmann <[email protected]>"]
-version = "0.6.7"
+version = "0.6.8"
 
 [deps]
 DocStringExtensions = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
@@ -13,7 +13,7 @@ SuiteSparse = "4607b0f0-06f3-5cda-b6b1-a6196a1729e9"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-DocStringExtensions = "^0.8.0"
+DocStringExtensions = "0.8.0,0.9"
 Requires = "^1.1.3"
 julia = "^1.5"