update changelog

shenwei356 · May 30, 2024 · 1fae752 · 1fae752
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 - v0.1.0
     - first version.
     - The speed is no ideal as the data structures and backtrace algorithm are inefficient.
+- v0.2.0
+    - rewrite the whole package.
+    - more accurate.
+    - 2X faster than v0.1.0, lower memory.