Include uncategorized category in default categories

README.md

@@ -100,7 +100,7 @@ Below is a complete example showcasing how to define a build, which is executed
 - Build changelog, given the tag
 - Create release on GitHub - specifying body with constructed changelog
 
-> Note: PRs will only show up in the changelog if assigned one of the default label categories "feature", "fix" or "test"
+> Note: Pre v4 PRs will only show up in the changelog if assigned one of the default label categories "feature", "fix" or "test". Starting with v4 these PRs will be in the `Uncategorized` section. 
 
 <details><summary><b>Example</b></summary>
 <p>

__tests__/releaseNotesBuilder.test.ts

@@ -144,6 +144,7 @@ it('Should fill `template` placeholders', async () => {
 
 it('Should fill `template` placeholders, ignore', async () => {
   const configuration = mergeConfiguration(undefined, resolveConfiguration('', 'configs_test/configuration_empty_all_placeholders.json'))
+  configuration.categories.pop() // drop `uncategorized` category
   const releaseNotesBuilder = new ReleaseNotesBuilder(
     null,
     null,

__tests__/releaseNotesBuilderPull.test.ts

@@ -133,6 +133,7 @@ nhoelzl
 
 it('Should match ordered ASC', async () => {
   const configuration = mergeConfiguration(undefined, resolveConfiguration('', 'configs_test/configuration_asc.json'))
+  configuration.categories.pop() // drop `uncategorized` category
   const options = {
     owner: 'mikepenz',
     repo: 'release-changelog-builder-action',
@@ -155,6 +156,7 @@ it('Should match ordered ASC', async () => {
 
 it('Should match ordered DESC', async () => {
   const configuration = mergeConfiguration(undefined, resolveConfiguration('', 'configs_test/configuration_desc.json'))
+  configuration.categories.pop() // drop `uncategorized` category
   const options = {
     owner: 'mikepenz',
     repo: 'release-changelog-builder-action',

__tests__/transform.test.ts

@@ -376,6 +376,7 @@ it('Match multiple labels exhaustive for category', async () => {
 
 it('Deduplicate duplicated PRs', async () => {
   const customConfig = Object.assign({}, DefaultConfiguration)
+  customConfig.categories.pop() // drop `uncategorized` category
   customConfig.duplicate_filter = {
     pattern: '\\[ABC-....\\]',
     on_property: 'title',
@@ -388,6 +389,7 @@ it('Deduplicate duplicated PRs', async () => {
 
 it('Deduplicate duplicated PRs DESC', async () => {
   const customConfig = Object.assign({}, DefaultConfiguration)
+  customConfig.categories.pop() // drop `uncategorized` category
   customConfig.sort = 'DESC'
   customConfig.duplicate_filter = {
     pattern: '\\[ABC-....\\]',