AsyncDependenciesResolver: provide implementation for sync resolve

idea/testData/script/definition/highlighting/asyncResolver/script.kts

@@ -0,0 +1,3 @@
+val j: Int = i
+
+val s: String = str

idea/testData/script/definition/highlighting/asyncResolver/template/template.kt

@@ -0,0 +1,22 @@
+package custom.scriptDefinition
+
+import kotlin.script.dependencies.*
+import kotlin.script.dependencies.experimental.*
+import kotlin.script.templates.*
+import java.io.File
+
+class TestDependenciesResolver : AsyncDependenciesResolver {
+    suspend override fun resolveAsync(scriptContents: ScriptContents, environment: Environment): DependenciesResolver.ResolveResult {
+        return ScriptDependencies(
+                classpath = listOf(environment["template-classes"] as File)
+        ).asSuccess()
+    }
+}
+
+@ScriptTemplateDefinition(TestDependenciesResolver::class, scriptFilePattern = "script.kts")
+class Template : Base()
+
+open class Base {
+    val i = 3
+    val str = ""
+}