Fix nightly bump num bigint (sigp#2591)

## Issue Addressed Builds again on latest nightly ## Proposed Changes Break was caused by: rust-lang/rust#88581
paulhauner · Sep 12, 2021 · e4ed42a · e4ed42a
1 parent f7dd24c
commit e4ed42a
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diff --git a/Cargo.lock b/Cargo.lock
diff --git a/common/eth2_interop_keypairs/Cargo.toml b/common/eth2_interop_keypairs/Cargo.toml
@@ -8,7 +8,7 @@ edition = "2018"
 
 [dependencies]
 lazy_static = "1.4.0"
-num-bigint = "0.3.0"
+num-bigint = "0.4.2"
 eth2_hashing = "0.2.0"
 hex = "0.4.2"
 serde_yaml = "0.8.13"