cmake: Correctly set the soversion based on SemVer properties

As this project follows Semantic Versioning, the shared object
version should match these semantics.

The two options that make sense here are to have the soversion
set to the version major (so only breaking changes are tracked)
or to set to version major and minor (so breaking and API additions
are tracked).

Since the Windows version of the library already uses version major
and version minor, let's just do this universally.

Fixes: 832926f ("Update library version handling for cmake")

Signed-off-by: Neal Gompa <[email protected]>

CMakeLists.txt

@@ -827,7 +827,7 @@ set_target_properties(
                           ${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH})
 set_target_properties(
   libtesseract PROPERTIES SOVERSION
-                          ${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH})
+                          ${VERSION_MAJOR}.${VERSION_MINOR})
 
 set_target_properties(
   libtesseract