fix(conventional-commits): skip release when no increment detected

This change treats the falsy value from conventional commits as
no increment detected, in which case we tell auto to skip it for
release consideration.

plugins/conventional-commits/src/index.ts

@@ -23,9 +23,10 @@ export default class ConventionalCommitsPlugin implements IPlugin {
             mappers.increment,
             parse(commit.subject)
           );
-          const incrementLabel = auto.semVerLabels.get(
-            conventionalCommit.increment as VersionLabel
-          );
+          // conventional commits will return a falsy value when no incrememnt is detected (e.g., chore/perf/refactor commits)
+          const commitIncrement =
+            (conventionalCommit.increment as VersionLabel) || "skip";
+          const incrementLabel = auto.semVerLabels.get(commitIncrement);
           const allSemVerLabels = [
             auto.semVerLabels.get(SEMVER.major),
             auto.semVerLabels.get(SEMVER.minor),