Ignore verify_all test on Windows

Causes too many spurious failures.

Author: GabrielMajeri

examples/mandelbrot/src/lib.rs

@@ -186,6 +186,7 @@ mod tests {
     use super::*;
 
     #[test]
+    #[cfg_attr(windows, ignore)]
     fn verify_all() {
         let width = 400;
         let height = 800;