Update/changelog 0.20 (#958)

* Updates to CHNAGELOG for next release.

Author: Diptorup Deb

CHANGELOG.md

@@ -4,6 +4,72 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Added
+* New dpjit decorator supporting dpnp compilation (#887)
+* Boxing and unboxing functionality for dpnp.ndarray to numba_dpex (#902)
+* New DpexTarget and dispatcher for compiling dpnp using numba-dpex (#887)
+* Overload implementation for dpnp.empty (#902)
+* Overload implementation for dpnp.empty_like, dpnp.zeros_like and
+  dpnp.ones_like inside dpjit (#928)
+* Overload implementation for dpnp.zeros and dpnp.ones inside dpjit (#923)
+* Compilation and offload support for dpnp vector style expressions using Numba
+  parfors (#957)
+* Compilation of over 70 ufuncs for dpnp inside dpjit (#957)
+* Backported the split parfor pass from upstream Numba. (#949)
+* Numba type aliases to numba_dpex. (#851)
+* Numba prange alias inside numba_dpex. (#957)
+* New LRU cache for kernels (#804) and funcs (#877)
+* New Range and NdRange classes for kernel submission that follow sycl's range
+  and ndrange syntax. (#888)
+* Monkey pacthes to Numba 0.56.4 to support dpnp ufuncs, allocating dpnp
+  arrays (#954)
+* New config flag (NUMBA_DPEX_DUMP_KERNEL_LLVM) to dump a kernel's
+  LLVM IR (#924)
+* A badge to our gitter chatroom (#919)
+* A small script to update copyright headers (#917)
+* A new dpexrt_python extension to support USM allocators for Numba
+  NRT_MemInfo (#902)
+* Updated examples for kernel API demonstrating compute-follows-data programming
+  model. (#826)
+
+### Changed
+* `CLK_GLOBAL_MEM_FENCE` and `CLK_LOCAL_MEM_FENCE` flags renamed to
+  `GLOBAL_MEM_FENCE` and `LOCAL_MEM_FENCE`. (#844)
+* Switched from Ubuntu-latest to Ubuntu-20.04 for conda package build (#836)
+* Rename USMNdArrayType to USMNdArray (#851)
+* Changes to the Numba type to represent dpnp ndarray typess now renamed to
+  DpnpNdarray (#880)
+* Improved exceptions and user errors (#804)
+* Updated internal API for kernel interface with improved support for
+  `__sycl_usm_array_interface__` protocol (#804)
+* Pin generated spirv version for kernels to 1.1 (#885)
+* Rename DpexContext and DpexTypingContext to DpexKernelTarget and
+  DpexKernelTypingContext (#887)
+* Renamed existing dpnp overloads that used stubs to dpnp_stubs_impl.py (#953)
+* Dpctl version requirement mismatch is now a warning and not an
+  ImportError (#925)
+* Update to versioneer 0.28 (#827)
+* Update to dpctl 0.14 (#858)
+* Update linters: black to 23.1.0, isort to 5.12.0 (#900)
+* License in setup.py to match actual project licensing (#904)
+### Fixed
+* Kernel specialization, compute follows data programming model for
+  kernels (#804)
+* Dispatcher/caching rewrite to address performance regression (#912, #896)
+* func decorator qualname ambiguation fix (#905)
+
+### Removed
+* Removes the numpy_usm_shared module from numba_dpex. (#841)
+* Removes the usage of llvmlite.llvmpy (#932)
+
+### Deprecated
+* Support for NumPy arrays as kernel arguments (#804)
+* Kernel argument access specifiers (#804)
+* Support for dpctl.device_context to launch kernels and njit offloading (#804)
+* Dpnp overloads using stubs. (#953)
+
 ## [0.19.0] - 2022-11-21
 
 ### Added