+ versions don't work sadface (#3)

* + versions don't work sadface

* Update bump-version.sh

* use post versions

Author: asottile-sentry

README.md

@@ -16,7 +16,7 @@ git checkout 1.2.3 -b sentry-1.2.3
 - cherry-pick relevant commit(s) from previous releases
 
 releases are done through craft in the release.yml workflow -- make sure to
-target your particular branch with a `+sentry#` release postfix
+target your particular branch with a `-#` release postfix (like `1.2.3-1`)
 
 ___
 

scripts/bump-version.sh

@@ -1,8 +1,9 @@
 #!/usr/bin/env bash
 set -euxo pipefail
 
-if ! grep -E '^.*\+sentry[0-9]+' <<< "$2"; then
-    : "version must be D.D.D+sentryD got: $2"
+if ! grep -E '^[0-9]+\.[0-9]+\.[0-9]+-[0-9]+$' <<< "$2"; then
+    : "expected #.#.#-# got $2"
     exit 1
 fi
+
 sed -i "s/^    version="'"'".*"'"'",$/    version="'"'"$2"'"'",/" setup.py