Rename StringBuilderExtensions* files to AppendableExtensions*

Author: cketti

…onMain/kotlin/StringBuilderExtensions.kt …ommonMain/kotlin/AppendableExtensions.ktkotlin-codepoints-deluxe/src/commonMain/kotlin/StringBuilderExtensions.kt renamed to kotlin-codepoints-deluxe/src/commonMain/kotlin/AppendableExtensions.kt kotlin-codepoints-deluxe/src/commonMain/kotlin/StringBuilderExtensions.kt renamed to kotlin-codepoints-deluxe/src/commonMain/kotlin/AppendableExtensions.kt

@@ -3,7 +3,7 @@ package de.cketti.codepoints.deluxe
 import kotlin.test.assertEquals
 import kotlin.test.Test
 
-class StringBuilderExtensionsTest {
+class AppendableExtensionsTest {
     @Test
     fun appendCodePoint() {
         val actual = buildString {

…st/kotlin/StringBuilderExtensionsTest.kt …nTest/kotlin/AppendableExtensionsTest.ktkotlin-codepoints-deluxe/src/commonTest/kotlin/StringBuilderExtensionsTest.kt renamed to kotlin-codepoints-deluxe/src/commonTest/kotlin/AppendableExtensionsTest.kt kotlin-codepoints-deluxe/src/commonTest/kotlin/StringBuilderExtensionsTest.kt renamed to kotlin-codepoints-deluxe/src/commonTest/kotlin/AppendableExtensionsTest.kt

@@ -3,7 +3,7 @@ package de.cketti.codepoints
 import kotlin.test.assertEquals
 import kotlin.test.Test
 
-class StringBuilderExtensionsTest {
+class AppendableExtensionsTest {
     @Test
     fun appendCodePoint() {
         val actual = buildString {