Update CHANGELOG and release version

CHANGELOG.md

@@ -1,3 +1,32 @@
+# v0.16.1 (2021-02-22)
+
+This minor release includes a new feature and associated fixes:
+* intel-oneapi support through new packages (#20411, #20686, #20693, #20717,
+  #20732, #20808, #21377, #21448)
+
+This release also contains bug fixes/enhancements for:
+* HIP/ROCm support (#19715, #20095)
+* concretization (#19988, #20020, #20082, #20086, #20099, #20102, #20128,
+  #20182, #20193, #20194, #20196, #20203, #20247, #20259, #20307, #20362,
+  #20383, #20423, #20473, #20506, #20507, #20604, #20638, #20649, #20677,
+  #20680, #20790)
+* environment install reporting fix (#20004)
+* avoid import in ABI compatibility info (#20236)
+* restore ability of dev-build to skip patches (#20351)
+* spack find -d spec grouping (#20028)
+* spack smoke test support (#19987, #20298)
+* macOS fixes (#20038, #21662)
+* abstract spec comparisons (#20341)
+* continuous integration (#17563)
+* performance improvements for binary relocation (#19690, #20768)
+* additional sanity checks for variants in builtin packages (#20373)
+* do not pollute auto-generated configuration files with empty lists or
+  dicts (#20526)
+
+plus assorted documentation (#20021, #20174) and package bug fixes/enhancements
+(#19617, #19933, #19986, #20006, #20097, #20198, #20794, #20906, #21411).
+
+
 # v0.16.0 (2020-11-18)
 
 `v0.16.0` is a major feature release.

lib/spack/spack/__init__.py

@@ -5,7 +5,7 @@
 
 
 #: major, minor, patch version for Spack, in a tuple
-spack_version_info = (0, 16, 0)
+spack_version_info = (0, 16, 1)
 
 #: String containing Spack version joined with .'s
 spack_version = '.'.join(str(v) for v in spack_version_info)