Add Julia 1.8 compat entry

FriesischScott · web-flow · commit 033b97854fb1 · 2022-08-26T14:37:55.000+01:00
diff --git a/Project.toml b/Project.toml
@@ -38,4 +38,4 @@ Primes = "0.5"
 QuasiMonteCarlo = "0.2.4"
 Reexport = "0.2, 1.0"
 Symbolics = "4"
-julia = "1.6, 1.7"
+julia = "1.6, 1.7, 1.8"
