Resolve other deprecation warnings

Author: fwcd

server/src/main/kotlin/org/javacs/kt/KotlinTextDocumentService.kt

@@ -135,11 +135,7 @@ class KotlinTextDocumentService(
         val code = extractRange(params.textDocument.content, params.range)
         listOf(TextEdit(
             params.range,
-            formatKotlinCode(
-                code,
-                isScript = params.textDocument.isKotlinScript,
-                options = params.options
-            )
+            formatKotlinCode(code, params.options)
         ))
     }
 
@@ -210,11 +206,7 @@ class KotlinTextDocumentService(
         LOG.info("Formatting {}", describeURI(params.textDocument.uri))
         listOf(TextEdit(
             Range(Position(0, 0), position(code, code.length)),
-            formatKotlinCode(
-                code,
-                isScript = params.textDocument.isKotlinScript,
-                options = params.options
-            )
+            formatKotlinCode(code, params.options)
         ))
     }
 

server/src/main/kotlin/org/javacs/kt/completion/Completions.kt

@@ -222,7 +222,7 @@ private fun extractPropertyName(d: DeclarationDescriptor): String {
     val match = Regex("(get|set)?((?:(?:is)|[A-Z])\\w*)").matchEntire(d.name.identifier)!!
     val upper = match.groups[2]!!.value
 
-    return upper[0].toLowerCase() + upper.substring(1)
+    return upper[0].lowercaseChar() + upper.substring(1)
 }
 
 private fun isGetter(d: DeclarationDescriptor): Boolean =

server/src/main/kotlin/org/javacs/kt/formatting/Formatter.kt

@@ -6,7 +6,6 @@ import org.eclipse.lsp4j.FormattingOptions
 
 fun formatKotlinCode(
     code: String,
-    isScript: Boolean = false,
     options: FormattingOptions = FormattingOptions(4, true)
 ): String = format(KtfmtOptions(
     style = KtfmtOptions.Style.GOOGLE,

server/src/main/kotlin/org/javacs/kt/j2k/JavaTypeConverter.kt

@@ -10,7 +10,7 @@ object JavaTypeConverter : PsiTypeVisitor<String>() {
 
     override fun visitPrimitiveType(primitiveType: PsiPrimitiveType): String = when (primitiveType.canonicalText) {
         "void" -> "Unit"
-        else -> primitiveType.canonicalText.capitalize()
+        else -> primitiveType.canonicalText.replaceFirstChar { it.uppercaseChar() }
     }
 
     override fun visitArrayType(arrayType: PsiArrayType): String = when (try {