chore: update changelog

chore: update changelog

chore: update changelog

feat(block-ciphers): add CAST5 algorithm

feat(KDFs): add PBKDF2 algorithm

feat(block-modes): add CTR block mode

refactor!: generic block cipher modes

refactor!: remove root mod.ts

perf(AES): reduce amount of array copies

refactor!: rewrite AES and Blowfish logic

- AES and Blowfish performance significantly improved
- added example to README.md
- added more tests
- dev dependencies moved to dev_deps.ts

BREAKING CHANGE: Block modes are now separated from encryption
logic and can be instantiated directly, e.g. AesEcb