Upgrade writer for simpler results

Details in writer https://github.com/Cirru/writer.clj/releases/tag/0.1.9 .

fix unstable ns value for add button

0.5.20

fix unstable ns value for add button; bump 0.5.20

handle nil ns selection

0.5.19-a3

handle nil ns selection; alpha release

add UI for setting version

Details #102 .

add a version field

Details #100 .

Stable release

0.5.18

release 0.5.18

add placeholder for :modules config

Details #99 .

fix code generating of inc data

Details #98 .

upgrade deps

0.5.18-a4

upgrade deps; alpha release

upgrade writer to fix deep nesting

Details #96 .