Update securesystemslib requirement from <1 to <2

[dependabot[bot]]

Updates the requirements on securesystemslib to permit the latest version.

Release notes

Sourced from securesystemslib's releases.

v1.0.0

See CHANGELOG.md for details.

Changelog

Sourced from securesystemslib's changelog.

securesystemslib v1.0.0

Securesystemslib API is now considered stable. The core functionality is provided in the Signer interface and the half a dozen integrated Signer implementations that can be found in the signer module. Smaller helper modules dsse, formats, hash and storage are also part of the API. Several legacy modules have been removed.

Added

• Signer: add public_key attribute to interface (#756)
• VaultSigner: Signer implementation for HashiCorp Vault (#800)
• CryptoSigner: support ecdsa keytype that is no longer in spec (#711)
• CryptoSigner: add private_bytes property (#799)
• CryptoSigner: add "file2" signer uri (#759)
• test: use localstack to test AWSSigner (#777)

Removed

• CryptoSigner: remove "file" signer uri (#759)
• migration script for legacy keys (#770)
• SSlibSigner class and *_securesystemslib_key methods (#771)
• legacy key key*, interface, util and schema modules (#772, #773, #776)
• unused functions in hash, and formats module (#774, #776)
• unused global key constants (#806)

Changed

• SSlibKey: strengthen input validation (#780, #795)
• AWSSigner: support default scheme and add stronger input validation (#724, #778)
• dsse: change Envelope.signatures type to dict (#743)
• vendor: update ed25519 copy (#793)
• docs: improve user and contributor docs (#744, #745, #746, #749, #759, #796)
• test: improve and temporarily disable SigstoreSigner test (#779, #785)
• ci: use dependabot groups, update weekly (#735)
• ci: test macOS and Windows on latest Python only (#797)
• Make securessystemslib.gpg internal (#792)

Fixed

• Fix check-upstream-ed25519 workflow permission (#706)
• SSlibKey: fix default scheme and test for ecdsa nistp384 key (#763 #794)

securesystemslib v0.31.0

Added

• CryptoSigner: create from cryptography private key with new constructor (#675)
• SSlibKey: create from cryptography public key with new from_crypto method (#678)
• Release: auto-release with PyPI Trusted Publishing (#683)
• Docs to migrate legacy key files (#658)

Removed

• Removed SSlibKey.from_pem factory method in favor of from_crypto (#678)

... (truncated)

Commits

• 1092ac6 Merge pull request #807 from lukpueh/release-1.0.0
• fe34bac Update v1.0.0 entry in CHANGELOG
• c682259 Release 1.0.0
• 5789578 Merge pull request #800 from lukpueh/vault-signer
• acae70a Add VaultSigner and tests
• 66a56cb Merge pull request #804 from secure-systems-lab/dependabot/pip/dependencies-9...
• c48a451 Merge pull request #803 from secure-systems-lab/dependabot/pip/test-and-lint-...
• 557378e Merge pull request #806 from lukpueh/rm-stray-globals
• 6975b81 Remove 3 stray global key type constants
• 402c898 Merge pull request #802 from lukpueh/rm-stability-disclaimers
• Additional commits viewable in compare view

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[ludeeus]

@dependabot ignore this dependency

[dependabot[bot]]

OK, I won't notify you about securesystemslib again, unless you re-open this PR.