Write API version to pom.properties for Versioning to read

Maven writes this metadata normally, but we don't use maven. Maybe should modify Versioning instead in the future, but this works just fine for now.

patches/api/0003-Add-FastUtil-to-Bukkit.patch

@@ -6,10 +6,10 @@ Subject: [PATCH] Add FastUtil to Bukkit
 Doesn't expose to plugins, just allows Paper-API to use it for optimization
 
 diff --git a/build.gradle.kts b/build.gradle.kts
-index fd47081fbc8cc5d88a57689d1beee5eddc78f845..95327c3971cd57e01da2a62e1b72ba15fcbb63f4 100644
+index b75ac1f11c3171a3f0c8edb30be3555216f51b0a..218e9c682e7b91dc27f2caf46316ba7a7982e5f3 100644
 --- a/build.gradle.kts
 +++ b/build.gradle.kts
-@@ -16,6 +16,7 @@ dependencies {
+@@ -18,6 +18,7 @@ dependencies {
      api("net.md-5:bungeecord-chat:1.16-R0.4")
      api("org.yaml:snakeyaml:1.29")
      api("com.googlecode.json-simple:json-simple:1.1.1") // Paper