Log Message:
libsecret: update to 0.20.2.

0.20.2
 * secret-file-collection: force little-endian in GVariant [!49, #42]
 * Prefer g_info() over g_message() [!48, #40]
 * meson: Don't specify shared_library() [!47]
 * docs: Make sure to set install: true [!46]