add change log

CHANGELOG.md

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+# Changelog
+
+## [Unreleased]
+
+-
+
+## v0.7.4
+
+### Added
+
+- Update tutorial.md (#226)
+- Lazy sentence split and tokenization (#231)
+  - Add `Tokenizer.lazyTokenizeSentences(SplitMode mode, Readable input)`, that performs analysis lazily and saves memory usage.
+
+### Fixed
+
+- Do not segfault on tokenizing with closed dictionary (#217)
+- The default config sudachi.json sets non-existent property joinKanjiNumeric in JoinNumericPlugin (#221)
+- fix incorrect size calculation when expand (#227)
+
+### Deprecated
+
+- `Tokenizer.tokenizeSentences(SplitMode mode, Reader input)` are marked as deprecated (#231)