Fix prefix so that tags are properly detected.

5 jobs for prrt-0.0.2 in 55 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #1089
build_prrt

00:00:33

 
  Test
passed #1091
test_prrt_functional

00:00:01

passed #1090
test_prrt_mem

00:00:15

 
  Deploy
passed #1092
package_pypi

00:00:05

 
  Clean
passed #1093
clean_pypirc

00:00:01