add `using Symbolics` to runtests

bc73ca63 · paulflang · a0326317 · bc73ca63
Commit bc73ca63 authored Jun 17, 2021 by paulflang
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -2,6 +2,7 @@
 using Test, SHA, SparseArrays, Downloads
 using SBML
 using SBML: Model, Reaction, Species
+using Symbolics
 import Pkg

 @testset "SBML test suite" begin