Add StatsFuns to integration tests (#451)

Author: devmotion

.github/workflows/IntegrationTest.yml

@@ -24,6 +24,7 @@ jobs:
           - {user: SciML, repo: DiffEqBase.jl}
           - {user: PumasAI, repo: DataInterpolations.jl}
           - {user: dfdx, repo: Yota.jl}
+          - {user: JuliaStats, repo: StatsFuns.jl}
 
     steps:
       - uses: actions/checkout@v2