[Security] Bump sshpk from 1.13.0 to 1.16.0

[dependabot-preview[bot]]

Bumps sshpk from 1.13.0 to 1.16.0. This update includes security fixes.

Vulnerabilities fixed

*Sourced from [The npm Advisory Database](https://npmjs.com/advisories/606).* > **Regular Expression Denial of Service** > Versions of `sshpk` before 1.13.2 or 1.14.1 are vulnerable to regular expression denial of service when parsing crafted invalid public keys. > > Affected versions: <1.13.2; >=1.14.0 <1.14.1 *Sourced from The GitHub Security Advisory Database.* > **Moderate severity vulnerability that affects sshpk** > The sshpk NPM package is vulnerable to ReDoS when parsing crafted invalid public keys. > > Affected versions: < 1.13.2 *Sourced from [The Node Security Working Group](https://github.com/nodejs/security-wg/blob/master/vuln/npm/401.json).* > **Denial of Service** > `sshpk` is vulnerable to ReDoS when parsing crafted invalid public keys > > Affected versions: <=1.13.1

Release notes

*Sourced from [sshpk's releases](https://github.com/joyent/node-sshpk/releases).* > ## v1.16.0 > * Add support for SPKI fingerprints, PuTTY PPK format (public-key only for now), PKCS#8 PBKDF2 encrypted private keys > * Fix for [#48](https://github-redirect.dependabot.com/joyent/node-sshpk/issues/48) > > ## v1.15.2 > * New API for accessing x509 extensions in certificates > * Fixes for [#52](https://github-redirect.dependabot.com/joyent/node-sshpk/issues/52), [#50](https://github-redirect.dependabot.com/joyent/node-sshpk/issues/50) > > ## v1.14.1 > * Remove all remaining usage of jodid25519 (abandoned dep) > * Add support for DNSSEC key format > * Add support for Ed25519 keys in PEM format (according to draft-curdle-pkix) > * Fixes for X.509 encoding issues (asn.1 NULLs in RSA certs, cert string type mangling) > * Performance issues parsing long SSH public keys

Commits

- [`574ff21`](https://github.com/joyent/node-sshpk/commit/574ff21e77117b478baf4664856bfc4b0aa41a12) joyent/node-sshpk#18 support for PKCS8 encrypted private keys - [`f647cf2`](https://github.com/joyent/node-sshpk/commit/f647cf22c3258ef514d2ba098a4a6aad3492f425) joyent/node-sshpk#27 Add support for PuTTY PPK format - [`44aec4a`](https://github.com/joyent/node-sshpk/commit/44aec4ad8bcf7324009c92a52e4c81487cbc24b9) joyent/node-sshpk#59 want support for SPKI fingerprint format - [`385ff11`](https://github.com/joyent/node-sshpk/commit/385ff11efc4edd201c07f2ceee23746c13122f9c) joyent/node-sshpk#48 wish: add support for x509 certificates in text form - [`c7a6c68`](https://github.com/joyent/node-sshpk/commit/c7a6c6833370f69322c47e73e9f4cfdedaf4e8f4) joyent/node-sshpk#58 des-ede3-cbc encrypted keys broken - [`2ab4f2a`](https://github.com/joyent/node-sshpk/commit/2ab4f2a018766559252f2c3426a3735f0860ac0d) joyent/node-sshpk#56 md5 fingerprints not quite right - [`026ef47`](https://github.com/joyent/node-sshpk/commit/026ef4764a55648dd15f45f7f14ff9da5d1fe2ad) joyent/node-sshpk#53 stop using optional deps to fix webpack - [`53e23fe`](https://github.com/joyent/node-sshpk/commit/53e23feff41226826b45293bc4a9fc45f2e44afe) joyent/node-sshpk#50 Support PKCS#5 AES-256-CBC encrypted private keys - [`6b68d49`](https://github.com/joyent/node-sshpk/commit/6b68d49abc7876d81cfa2f3947024f4a84c21a94) joyent/node-sshpk#54 want API for accessing x509 extensions - [`1088992`](https://github.com/joyent/node-sshpk/commit/10889924a536c3e3a839c00a31727d60f6d55756) joyent/node-sshpk#52 Buffer no longer performs length check for hex strings i... - Additional commits viewable in [compare view](https://github.com/joyent/node-sshpk/compare/v1.13.0...v1.16.0)

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Superseded by #193.