API: Bump num-complex to version 0.3

Use num-complex without activating std (because ndarray does not need it
by itself) - this means we can't use norm by default in the test.

Cargo.toml

@@ -30,7 +30,7 @@ test = true
 [dependencies]
 num-integer = "0.1.39"
 num-traits = "0.2"
-num-complex = "0.2"
+num-complex = { version = "0.3", default-features = false }
 
 rayon = { version = "1.0.3", optional = true }
 

tests/complex.rs

@@ -10,7 +10,7 @@ fn c<T: Clone + Num>(re: T, im: T) -> Complex<T> {
 #[test]
 fn complex_mat_mul() {
     let a = arr2(&[[c(3., 4.), c(2., 0.)], [c(0., -2.), c(3., 0.)]]);
-    let b = (&a * c(3., 0.)).map(|c| 5. * c / c.norm());
+    let b = (&a * c(3., 0.)).map(|c| 5. * c / c.norm_sqr());
     println!("{:>8.2}", b);
     let e = Array::eye(2);
     let r = a.dot(&e);