Update serde_json to 1.0.2 for rusoto_credential
Update serde_json to 1.0.2 for rusoto_credential

DualSpark/rusoto,rusoto/rusoto,DualSpark/rusoto,DualSpark/rusoto,DualSpark/rust-aws,mattico/rusoto,DualSpark/rust-aws,mattico/rusoto,DualSpark/rust-aws,SecurityInsanity/rusoto,rusoto/rusoto,SecurityInsanity/rusoto,mattico/rusoto,rusoto/rusoto