build(deps): Update async-std-resolver requirement from 0.20 to 0.21

[dependabot]

Updates the requirements on async-std-resolver to permit the latest version.

Release notes

Sourced from async-std-resolver's releases.

v0.21.1

0.21.1

Fixed

• (util) fixed feature build issue in resolve #1649

Changelog

Sourced from async-std-resolver's changelog.

0.21.1

Fixed

• (util) fixed feature build issue in resolve #1649

0.21.0

Added

• (client) Parse DS records (@​kmkaplan) #1635
• (fuzz) Added fuzzing configuration (@​saethlin) #1626
• (resolver) Add resolver.clear_cache() sync and async (dns2utf8) #1611
• (proto) Add CDS/CDNSKEY records from RFC7344 (frelon) #1595
• (resolver) Configuration of outbound bind address for resolver (@​surban) #1586
• (proto) Add CSYNC record from RFC7477 (@​frelon) #1583
• (proto) trust_dns_proto::rr::Record now serializable (@​mvforell) #1536
• (client) new zone_transfer method for AXFR and IXFR use cases, client only (@​trinity-1686a) #1478
• (client) Flag for use_edns configuration on AsyncClient (@​astro) #1492
• (client) support for TSIG authentication (@​trinity-1686a) #1459

Changed

• (util) openssl is no longer default enabled in trust-dns-utils, bins marked as required as necessary #1644
• (proto) deprecate outdated dnssec algorithms #1640
• (server) pass RequestInfo into Authority on search #1620
• (proto) SSHFP: Ed448 is assigned algorithm 6 in RFC 8709 #1604
• (resolver) Do not retry the same name server on a negative response (@​peterthejohnston) #1589
• (all) with-backtrace feature renamed to backtrace (@​pinkisemils) #1577
• (resolver) TCP for truncated message responses, but not for other failures on responses (switch for old behavior try_tcp_on_error) ( @​peterthejohnston) #1562
• (server) Multiple queries in a message will always result in a FormError now #1554
• (server) ServerFuture and other Catalog related API changes #1554
• (server) By default, the server will now only log a single log line based for a given request (debug will be needed for more details) #1554
• (server) ResponseHandler now must return a ResponseInfo to allow for more consistent logging #1554
• (resolver) Correct behavior around trust_nx_responses (@​peterthejohnston) #1556
• (server) ResponseHandler trait is now async_trait, requires all impls to be annotated with #[async_trait] #1550
• (server) Authority impls required to be internally modifiable and Send + Sync #1550
• (server) Most Authority methods changes to async fn rather than returning custom Future impls #1550
• (server) Authority trait is now async_trait, requires all impls to be annotated with #[async_trait] #1550
• (proto) Header now stores ResponseCode instead of just u8 #1537
• (client) improved async client example documentation (@​ErwanDL) #1539
• (resolver) on REFUSED (and other negative) response(s), fall back to other nameservers (@​peterthejohnston) #1513 #1526
• (client) the feature dnssec is no longer enabled by default, use dnssec-ring or dnssec-openssl #1506
• (server) dnssec functions of Authority moved into DnsSecAuthority #1506
• (all) Most public enum types are now marked #[non_exaustive] #1426
• (resolver) DnsRequestOptions and ResolverOpts now #[non_exaustive] #1426
• (proto) all I/O Streams now use BufDnsStreamHandle rather than generic DnsStreamHandle #1433
• (proto) DnsResponse response now contains only a single Response #1433
• (proto) Name::append_name and Name::append_domain now properly fallible when name is too long #1448
• (resolver) special handling of the onion. TLD added to static resolution with negative responses (@​trinity-1686a) #1479

... (truncated)

Commits

• 7e4f9b2 prepare 0.21.1 release
• 312b8ab fix resolve build with dns over rustls
• 47713cc remove depdabot tag
• 0d577f1 bump enum-as-inner to 0.4
• cca5155 prepare 0.21.0 for release
• 3eeee75 cleanup trust-dns-util to not always enable openssl
• 4929738 fix clippy warnings for 1.59.0
• e22a7e7 remove structopt dependency
• 59b9711 deprecate outdated dnssec algorithms
• 13998d5 Parse DS records (#1635)
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)