fix: add missing aqua.jl test file

Author: s-celles

.gitignore

@@ -17,6 +17,8 @@
 
 !test/
 !test/*.jl
+!test/package/
+!test/package/*.jl
 
 !docs/
 !docs/**

test/package/aqua.jl

@@ -0,0 +1,10 @@
+using Aqua
+using MathJSON
+
+@testset "Aqua.jl Quality Tests" begin
+    Aqua.test_all(
+        MathJSON;
+        ambiguities = false,  # Will enable once we have more methods
+        stale_deps = (ignore = [:JSON3],),  # JSON3 used but not directly called yet
+    )
+end