Wrap all test files in a @testset (#85)

So if one file errors we still run all files.

Author: nickrobinson251

test/runtests.jl

@@ -1,9 +1,10 @@
 using BlockArrays, LinearAlgebra, Test
 
-include("test_blockindices.jl")
-include("test_blockarrays.jl")
-include("test_blockviews.jl")
-include("test_blockrange.jl")
-include("test_blockarrayinterface.jl")
-
-include("test_blockbroadcast.jl")
+@testset "BlockArrays.jl" begin
+    include("test_blockindices.jl")
+    include("test_blockarrays.jl")
+    include("test_blockviews.jl")
+    include("test_blockrange.jl")
+    include("test_blockarrayinterface.jl")
+    include("test_blockbroadcast.jl")
+end