Bump num from 0.3.1 to 0.4.0

Bumps [num](https://github.com/rust-num/num) from 0.3.1 to 0.4.0.
- [Release notes](https://github.com/rust-num/num/releases)
- [Changelog](https://github.com/rust-num/num/blob/master/RELEASES.md)
- [Commits](https://github.com/rust-num/num/compare/num-0.3.1...num-0.4.0)

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.lock

@@ -457,7 +457,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c0d5c9540a691d153064dc47a4db2504587a75eae07bf1d73f7a596ebc73c04"
 dependencies = [
  "matrixmultiply",
- "num-complex",
+ "num-complex 0.3.1",
  "num-integer",
  "num-traits",
  "rawpointer",
@@ -471,11 +471,11 @@ checksum = "2178127478ae4ee9be7180bc9c3bffb6354dd7238400db567102f98c413a9f35"
 
 [[package]]
 name = "num"
-version = "0.3.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b7a8e9be5e039e2ff869df49155f1c06bd01ade2117ec783e56ab0932b67a8f"
+checksum = "43db66d1170d347f9a065114077f7dccb00c1b9478c89384490a3425279a4606"
 dependencies = [
- "num-complex",
+ "num-complex 0.4.0",
  "num-integer",
  "num-iter",
  "num-rational",
@@ -491,6 +491,15 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-complex"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26873667bbbb7c5182d4a37c1add32cdf09f841af72da53318fdb81543c15085"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.44"
@@ -514,9 +523,9 @@ dependencies = [
 
 [[package]]
 name = "num-rational"
-version = "0.3.2"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12ac428b1cb17fce6f731001d307d351ec70a6d202fc2e60f7d4c5e42d8f4f07"
+checksum = "d41702bd167c2df5520b384281bc111a4b5efcf7fbc4c9c222c815b07e0a6a6a"
 dependencies = [
  "autocfg",
  "num-integer",

dsp/Cargo.toml

@@ -8,7 +8,7 @@ edition = "2018"
 libm = "0.2.1"
 serde = { version = "1.0", features = ["derive"], default-features = false }
 generic-array = "0.14"
-num = { version = "0.3.1", default-features = false }
+num = { version = "0.4.0", default-features = false }
 miniconf = "0.1"
 
 [dev-dependencies]