Too tight tolerance in time test

[KristofferC]

It seems this package sometimes error with

dt = 1.384542466
fpswhen: Test Failed at /home/pkgeval/.julia/packages/Reactive/g1LZ6/test/time.jl:22
  Expression: isapprox(dt, 1, atol=0.3)
   Evaluated: isapprox(1.384542466, 1; atol=0.3)
Stacktrace:
 [1] top-level scope at /home/pkgeval/.julia/packages/Reactive/g1LZ6/test/time.jl:22
 [2] top-level scope at /workspace/srcdir/julia/usr/share/julia/stdlib/v1.3/Test/src/Test.jl:1107
 [3] top-level scope at /home/pkgeval/.julia/packages/Reactive/g1LZ6/test/time.jl:4
 [4] top-level scope at /workspace/srcdir/julia/usr/share/julia/stdlib/v1.3/Test/src/Test.jl:1107
 [5] top-level scope at /home/pkgeval/.julia/packages/Reactive/g1LZ6/test/time.jl:3

from https://github.com/maleadt/BasePkgEvalReports/blob/df660562b2dd1fc99b44e1ea582934701d8d421f/8639e57_vs_46ce4d7/logs/Reactive/1.3.1-pre-8639e5771d.log#L77-L85

It would be good if this could be fixed because it contributes some noise to the automatic tests on packages we run on different Julia versions.