Normalize repository files

.gitattributes

@@ -4,10 +4,12 @@
 /.github                     export-ignore
 /.gitignore                  export-ignore
 /.php-cs-fixer.dist.php      export-ignore
+/composer.lock               export-ignore
 /docs                        export-ignore
 /phpstan.neon.dist           export-ignore
 /phpunit.xml.dist            export-ignore
 /tests                       export-ignore
 
 /docs/**                     linguist-documentation
 /tests/Fixtures/**           -linguist-detectable
+/tests/fixtures/**           -linguist-detectable

.gitignore

@@ -5,6 +5,3 @@
 /.php-cs-fixer.cache
 /coverage/
 /coverage.xml
-/clover.xml
-/phpstan.neon
-/phpunit.xml

README.md

@@ -79,17 +79,19 @@ composer qa
 
 Changes to public behavior should include tests and documentation.
 
-Bundled definitions live in `data/languages/`. Add one file named after the language slug; the
-catalog consistency tests validate its identifiers, filenames, and parent relationship.
+Bundled definitions live in `data/languages/`. Add one file named after the
+language slug; catalogue tests validate identifiers, filenames, and parent
+relationships.
 
 ## Support
 
-ALTO Language is open source. You can support its continued development through
+ALTO Language is open source and independently maintained by
+[Simon André](https://smnandre.dev). If it is useful to your work, you can
+support its continued development through
 [GitHub Sponsors](https://github.com/sponsors/smnandre).
 
-Sharing this package with others or
-[starring it on GitHub](https://github.com/altophp/language) is also much
-appreciated.
+Sharing the package or
+[starring it on GitHub](https://github.com/altophp/language) also helps.
 
 ## License