Update CHANGES for 21.03 (#1830)

CHANGES

@@ -1,3 +1,38 @@
+# 21.03
+
+  -- Support multiple components in the ABecLaplacian solver. (#1825)
+
+  -- Add query functions to Arena. (#1823) They can be used to find out the
+     memory type and if the memory is accessible on device or host.
+
+  -- CMake: add -Wno-pass-failed to Clang-based compilers (#1815)
+
+  -- Option to cover multiple cuts in EB generation (#1810)
+
+  -- The_Async_Arena and Elixir::append (#1804)
+
+  -- Add function name output option to TinyProfiler. (#1803)
+
+  -- DPCPP: Use codeplay_host_task (#1797)
+
+  -- Add ParticleArray classes (#1796)
+
+  -- ParallelCopy_nowait & ParallelCopy_finish (#1765)
+
+  -- Add FabArray::tags() to return the tags. (#1794)
+
+  -- Bump minimum C++ standard from 11 to 14. (#1787)
+
+  -- Update the preferred short name of NVIDIA HPC SDK to nvhpc (#1788)
+
+  -- Fix precision issue in ParmParse::add (#1783)
+
+  -- Overset Solver with Refinement Ratio of 4 (#1778)
+
+  -- Refinement Ratio of 4 Support in Nodal Solver (#1774)
+
+  -- MSVC: Proper __cplusplus macro (#1773)
+
 # 21.02
 
   -- Abort when MLMG is detected as failing regardless of verbosity