Add a GC pass after certain tests (#864)

Author: jishnub

test/runtests.jl

@@ -26,10 +26,10 @@ end
 
 include(joinpath(@__DIR__, "testutils.jl"))
 
-include("ReadmeTest.jl")
-include("ExtrasTest.jl")
-include("NumberTypeTest.jl")
-include("FractionalTest.jl")
+include("ReadmeTest.jl"); GC.gc();
+include("ExtrasTest.jl"); GC.gc();
+include("NumberTypeTest.jl"); GC.gc();
+include("FractionalTest.jl"); GC.gc();
 
 @testset "Chebyshev and Fourier" begin
     @test norm(Fun(x->Fun(cos,Fourier(-π .. π),20)(x),20)-Fun(cos,20)) <100eps()