Update and release version 2.10.1.

include/ensmallen_bits/ens_version.hpp

@@ -12,10 +12,10 @@
 
 // This follows the Semantic Versioning pattern defined in https://semver.org/.
 
-#define ENS_VERSION_MAJOR 1
+#define ENS_VERSION_MAJOR 2
 // The minor version is two digits so regular numerical comparisons of versions
 // work right.  The first minor version of a release is always 10.
-#define ENS_VERSION_MINOR 12
+#define ENS_VERSION_MINOR 10
 #define ENS_VERSION_PATCH 1
 // If this is a release candidate, it will be reflected in the version name
 // (i.e. the version name will be "RC1", "RC2", etc.).  Otherwise the version