Bump sshpk from 1.13.1 to 1.15.2

[dependabot]

Bumps sshpk from 1.13.1 to 1.15.2.

Release notes

Sourced from sshpk's releases.

v1.15.2

• New API for accessing x509 extensions in certificates
• Fixes for #52, #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

• c7a6c68 des-ede3-cbc encrypted keys broken TritonDataCenter/node-sshpk#58 des-ede3-cbc encrypted keys broken
• 2ab4f2a md5 fingerprints not quite right TritonDataCenter/node-sshpk#56 md5 fingerprints not quite right
• 026ef47 stop using optional deps to fix webpack TritonDataCenter/node-sshpk#53 stop using optional deps to fix webpack
• 53e23fe Support PKCS#5 AES-256-CBC encrypted private keys TritonDataCenter/node-sshpk#50 Support PKCS#5 AES-256-CBC encrypted private keys
• 6b68d49 want API for accessing x509 extensions TritonDataCenter/node-sshpk#54 want API for accessing x509 extensions
• 1088992 Buffer no longer performs length check for hex strings in node v8.x  TritonDataCenter/node-sshpk#52 Buffer no longer performs length check for hex strings i...
• 6ec6f9d want support for more obscure DN OIDs TritonDataCenter/node-sshpk#38 want support for more obscure DN OIDs
• 1cc4c99 package.json repository does not point to Joyent TritonDataCenter/node-sshpk#51 package.json repository does not point to Joyent
• 175758a Use Buffer.(from|alloc) instead of deprecated Buffer API TritonDataCenter/node-sshpk#46 Use Buffer.(from|alloc) instead of deprecated Buffer API
• 6edb37c Release 1.14.0
• Additional commits viewable in compare view

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[dependabot]

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