Update Rust crate ipnetwork to v0.21.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ipnetwork	dependencies	minor	=0.20.0 -> =0.21.0

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Release Notes

achanda/ipnetwork (ipnetwork)

v0.21.0

Compare Source

Fixed

• fix for 0.0.0.0/0 network (#​199)
• (deps) update rust crate serde to 1.0.200 (#​196)
• (deps) update rust crate serde to 1.0.199 (#​194)
• use associated constants (#​191)

Other

• Update .gitignore
• Update publish.yml
• Update publish.yml
• Replace Ipv{4,6}Network::new_unchecked with Ipv{4,6}Network::new_checked (#​203)
• Make the serde feature opt-in instead of opt-out (#​200)
• Fix typo (#​198)
• Update publish.yml (#​195)
• (deps) update rust crate serde_json to 1.0.116 (#​193)
• setup release plz (#​192)
• Update Rust crate criterion to 0.5.1 (#​172)
• Update actions/checkout action to v4 (#​182)
• rewrite core ipv6 methods to operate on u128s (#​187)
• move to dtolnay/rust-toolchain and run clippy (#​189)
• Hash implementation to match PartialEq (#​186)
• Update Rust crate schemars to 0.8.17 (#​184)
• Add const unsafe new_unchecked to Ipv4Network & Ipv6Network (#​185)
• Update Rust crate schemars to 0.8.15 (#​183)
• Update Rust crate schemars to 0.8.13 (#​181)
• Add Ipv6Network::nth to get the nth address (take two) (#​176)
• Added needed traits to NetworkSize (#​175)
• Update criterion requirement from 0.4.0 to 0.5.0
• Update katyo/publish-crates action to v2
• Update actions/checkout action to v3
• Update Rust crate schemars to 0.8.12
• Add renovate.json
• Replace assert_eq with assert for bool comparison
• Use cargo clippy --fix to autofix code
• Add a reference where missing
• Cleanup mask for Ipv4Addr
• Shrink the enumerate call on mask
• Cleanup both size functions
• Simplify FromStr for Ipv6Network
• Make parse_prefix more idiomatic
• Update criterion requirement from 0.3.4 to 0.4.0 (#​162)
• Update does-it-json requirement from 0.0.3 to 0.0.4 (#​161)

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