Add TODO

Author: ufechner7

test/runtests.jl

@@ -1,5 +1,8 @@
 using Test
 
+# TODO fix allocation tests
+# see: https://github.com/JuliaArrays/FixedSizeArrays.jl/blob/d17373edf4144a672cd80a062bf24d017f01e42f/test/runtests.jl#L6-L17
+# and: https://github.com/JuliaArrays/FixedSizeArrays.jl/blob/d17373edf4144a672cd80a062bf24d017f01e42f/.github/workflows/UnitTests.yml
 cd("..")
 println("Running tests...")
 @testset verbose = true "Testing VortexStepMethod..." begin