working CLI tool, versioning support, etc

library/src/commonMain/kotlin/net/sergeych/lyng/Script.kt

@@ -21,7 +21,6 @@ class Script(
     companion object {
         val defaultContext: Context = Context().apply {
             addFn("println") {
-                print("yn: ")
                 for ((i, a) in args.withIndex()) {
                     if (i > 0) print(' ' + a.asStr.value)
                     else print(a.asStr.value)

library/src/commonMain/kotlin/net/sergeych/lyng/ScriptError.kt

@@ -5,6 +5,7 @@ package net.sergeych.lyng
 open class ScriptError(val pos: Pos, val errorMessage: String,cause: Throwable?=null) : Exception(
     """
         $pos: Error: $errorMessage
+        
         ${pos.currentLine}
         ${"-".repeat(pos.column)}^
     """.trimIndent(),

library/src/commonMain/kotlin/net/sergeych/lyng/globals.kt

@@ -0,0 +1,5 @@
+package net.sergeych.lyng
+
+import net.sergeych.lyng.buildconfig.BuildConfig
+
+val LyngVersion = BuildConfig.VERSION

library/src/commonTest/kotlin/ScriptTest.kt

@@ -6,6 +6,12 @@ import kotlin.test.*
 
 class ScriptTest {
 
+    @Test
+    fun testVersion() {
+        println("--------------------------------------------")
+        println("version = ${LyngVersion}")
+    }
+
     @Test
     fun parseNewlines() {
         fun check(expected: String, type: Token.Type, row: Int, col: Int, src: String, offset: Int = 0) {