Bump num-bigint from 0.4.3 to 0.4.4 (#931)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -40,7 +40,7 @@ url = "2.4.1"
 # idna is already required by url, added here to be explicit
 idna = "0.4.0"
 base64 = "0.21.3"
-num-bigint = "0.4.3"
+num-bigint = "0.4.4"
 python3-dll-a = "0.2.7"
 uuid = "1.4.1"