add large_matrix test

tests/large_matrix.rs

@@ -0,0 +1,11 @@
+use rlst::rlst_dynamic_array2;
+
+#[test]
+fn inverse_100() {
+    let size = 100;
+    let mut m = rlst_dynamic_array2!(f64, [size, size]);
+    for i in 0..size {
+        m[[i, i]] = 1.0;
+    }
+    m.view_mut().into_inverse_alloc().unwrap();
+}