CompatHelper: bump compat for Symbolics to 7, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -1,7 +1,7 @@
 name = "TaylorDiff"
 uuid = "b36ab563-344f-407b-a36a-4f200bebf99c"
-authors = ["Songchen Tan <i@tansongchen.com>"]
 version = "0.3.4"
+authors = ["Songchen Tan <i@tansongchen.com>"]
 
 [deps]
 ChainRules = "082447d4-558c-5d27-93f4-14fc19e9eca2"
@@ -27,6 +27,6 @@ MacroTools = "0.5"
 NNlib = "0.9"
 SpecialFunctions = "2"
 SymbolicUtils = "3, 4"
-Symbolics = "6"
+Symbolics = "6, 7"
 Zygote = "0.6, 0.7"
 julia = "1.10"