Noteworthy changes in version 1.6.0 (2021-06-10) [C22/A14/R0]
 * Limited support for the Authenticated-Enveloped-Data content type.
   [rK81fdcd680c12]
 * Support password based decryption.  [rKcb7f2484a09c]
 * Fix build problem on macOS.  (T5440)
 * Silence warnings from static analyzers.  (T5395)
 * Interface changes relative to the 1.5.0 release:
   - `KSBA_CT_AUTHENVELOPED_DATA       NEW`.
(prev: T5379 next: tbd)