Bump the version to 0.3.2

Set VERSION in src/lib/constants.sh to 0.3.2 and the --version check in
tests/test-security.sh to match. This is task 5 of MIL-009, the Git excludes
step. Release v0.3.2 is tagged on Gitea from the merge commit once the pull
request is merged.

Refs #69
Task: MIL-009#5

tests/test-security.sh

@@ -103,7 +103,7 @@ test_usage_errors() {
   assert_contains "help shows exit codes" "$OUT" "Exit codes"
   run_cli "" --version
   assert_status "version" 0 "$STATUS"
-  assert_contains "version output" "$OUT" "RepoFoundry 0.3.1"
+  assert_contains "version output" "$OUT" "RepoFoundry 0.3.2"
 }
 
 test_warns_when_env_is_not_ignored_by_git() {