fix: Typo in error messages

lib/plugins/definitions.js

@@ -38,7 +38,7 @@ module.exports = {
     },
     output: {
       validator: output => !output || RELEASE_TYPE.includes(output),
-      message: 'The "analyzeCommits" plugin output must be either undefined or a valid semver release type.',
+      message: 'The "analyzeCommits" plugin output, if defined, must be a valid semver release type.',
     },
   },
   verifyRelease: {

lib/plugins/normalize.js

@@ -27,7 +27,7 @@ module.exports = (pluginType, pluginConfig, logger, validator) => {
     const result = await func(cloneDeep(input));
 
     if (validator && !validator.validator(result)) {
-      throw new Error(`${validator.message}. Received: ${inspect(result)}`);
+      throw new Error(`${validator.message} Received: ${inspect(result)}`);
     }
     return result;
   };