update changelog

CHANGELOG.md

@@ -2,6 +2,50 @@
 
 The Python bindings of `polars` have their own changelog.
 
+### Polars 0.16.0
+* features
+  - [read compression streams](05c672965c4f05d78c3d649fa200562d8a78f222)
+  - [improve window exprs](49a52f71215b428ee362843c1620983126ed19a4)
+  - [interpolate series](28a858da832a12c44f3e352080c06fa06f6798f8)
+  - [add flattened window exprs](eaf8bacb5356756d893b041cd06a71771e527597)
+  - [Series::fill_nan](38f7acb49e84a605c6c6318447c2dfd9ad41b20f)
+  - [improve consistency of agg exprs](93e82d5b6abe4e35389f6c282d01c8a3234f1192)
+  - [prefix/suffix exprs](prefix/suffix)
+  - [DataFrame::transpose](c3310fc5c68b55b3a5ff11480f36203937fba958)
+  - [rolling window functions in lazy](1429dbc6e443cd1dbeada0aa9146dfedf9f7eaaf)
+  - [add .arr namespace](42f54e30cc3c40fdbd3271a5a4e10666135a8fa6)
+  - [argsort expr](c9c41316ef701e058e65b1b114292b2baf3c032e)
+  - [rank: (min, max, avg, dense, ordinal)][a42a78142125b84e2acaba51f60bc37e5c92cda6]
+  - [add null behvavior of horizontal sum/mean](e86417a10c4908e5d77d2ec39e8a5b5061101301)
+  - [skew aggregation](5b69beebae78da6bf1eb9360394c457e7899c7b1)
+  - [kurtosis aggregation](5a21ddcd01c676536dfbf44342b98ba28d6b7831)
+  - and a lot more
+* bug fix
+  - [Categorical type append](b301358246453337d3a391a97616cfb5e68d1e4d)
+  - [fix serde](1447a570f604e3a920972bc87dbf3b4f7fd19ac5)
+  - [csv decompression][33f69fe33e70cbeffda04ea218df525bcf6fce8a]
+  - [fix O^2 pivot.count](21f77c7349da80d937bd7cb6aaeed4af266157d0)
+  - [improve type-casting optimizer](ca69f6cab7b095b91e07f3d7899f89a6525a9754)
+  - [fix agg_quantile](1f61a1c89fd9ae9f037a8d07bb9dd7bc4dc1a2ef)
+  - [fix explode/flatten on slice lists](938cd9ab033e5dac9cf83fc9d915c825a9007bdb)
+  - [fix bug in utf8/categorical cast](ecaad33855d9a32f4e822f4b1b548806da724791)
+  - [fix float join on multiple columns](e597e93ec52206a6b4a64c8c388e1bab3a405660)
+  - [csv parser handle files without EOF](81a79b5be80890fa34ccc011354898ea77a45267)
+  - [fix df explode on df's with single column](ef12a1204bc715434433531cf449b0ccbeca9660)
+  - [change asof join behavior](bd17e69ff9b1157443fc9381a89cd7a3d2346471)
+  - fix bugs in predicate pushdown
+  - and a lot more
+* performance
+  - [lazy drop nulls optimization](4ab0d890e4f07f52cebbd5c2c4accef11f103019)
+  - [improve fill_null performance](ae5e6af290086193c35c288f4af9d13edd5795a0)
+  - [improve primitive sorting](f0253094bdacda9886e5521d5d380c40ee3b1639)
+  - [improve hashing performance](64847767f6af488b8c72ce7e06facec8230fbf86)
+  - improve csv parser (faster float parsing/ less utf8 checks)
+  - [unstable sort in stable groupby](97139effbc109fdfb7c0cbe1922649b1965c3649)
+  - improve performance of list iteration (this is used in most groupby + apply exprs)
+
+
+
 ### Polars 0.15.0
 * feature
   - extract jsonpath