release 3.2.1

Bugfixes

• depend on liboauth2 1.4.2.1 with fixed iat slack validation defaults
• use ngx_pcalloc instead of ngx_pnalloc to align memory access; see #2

Packaging

• the liboauth2 >= 1.4.2.1 dependencies can be found here: https://github.com/zmartzone/liboauth2/releases.