Prepare 0.5.0 release

Author: HT154

docs/antora.yml

@@ -1,5 +1,5 @@
 name: lsp
 title: Pkl Language Server
-version: 0.4.0
+version: 0.5.0
 nav:
   - nav.adoc

docs/modules/ROOT/pages/CHANGELOG.adoc

@@ -1,5 +1,24 @@
 = Changelog
 
+[[release-0.5.0]]
+== 0.5.0 (TBD)
+
+=== Fixes
+
+* Improves type checking around `is NonNull` checks (https://github.com/apple/pkl-lsp/pull/102[#102])
+* Fixes an edge case when type checking complex union types (https://github.com/apple/pkl-lsp/pull/105[#105])
+
+=== Changes
+
+* Update Pkl standard library and grammar to 0.30 and add support for trailing commas (TBD).
+
+=== Contributors ❤️
+
+Thank you to all of our contributors!
+
+* https://github.com/HT154[@HT154]
+* https://github.com/stackoverflow[@stackoverflow]
+
 [[release-0.4.0]]
 == 0.4.0 (2025-07-28)
 

gradle.properties

@@ -1,2 +1,2 @@
 group=org.pkl-lang
-version=0.4.0
+version=0.5.0

gradle/libs.versions.toml

@@ -42,4 +42,4 @@ kotlin = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 kotlinSerialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
 shadow = { id = "com.github.johnrengelman.shadow", version.ref = "shadowPlugin" }
 spotless = { id = "com.diffplug.spotless", version.ref = "spotless" }
-nexusPublish = { id = "io.github.gradle-nexus.publish-plugin", version.ref = "nexusPublishPlugin" }
+nexusPublish = { id = "io.github.gradle-nexus.publish-plugin", version.ref = "nexusPublishPlugin" }