fix: JVM OOM issues during gradle build (#28)

Enabling Async generates additional classes. The default
max memory setting is set to 500MB which is
insufficient for compilation. This configures
a more liberal setting.

tl;dr - async features are not generated due
to falling back to older speakeasy versions.

Author: vishalg0wda

build-extras.gradle

@@ -1,4 +1,9 @@
-// This file 
+// This file
 // * is referred to in an `apply from` command in `build.gradle`
 // * can be used to customise `build.gradle`
 // * is generated once and not overwritten in SDK generation updates
+
+tasks.withType(JavaCompile).configureEach {
+    options.fork = true
+    options.forkOptions.jvmArgs = ['-Xmx2g', '-XX:MaxMetaspaceSize=1g']
+}