fix tests on 1.7

[codecov[bot]]

Codecov Report

Merging #11 (8277272) into master (25d01c8) will decrease coverage by 0.00%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #11      +/-   ##
==========================================
- Coverage   99.10%   99.09%   -0.01%     
==========================================
  Files           4        3       -1     
  Lines         112      111       -1     
==========================================
- Hits          111      110       -1     
  Misses          1        1              

Impacted Files	Coverage Δ
src/util.jl	100.00% <100.00%> (ø)
src/UnsafeArrays.jl

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[oschulz]

Thanks @KristofferC !