Use proper enum value for Language directive.

.clang-format

@@ -3,7 +3,7 @@ BasedOnStyle: WebKit
 IndentWidth: 4
 ColumnLimit: 80
 ---
-Language: cpp
+Language: Cpp
 PointerAlignment: Middle
 IndentCaseLabels: true
 BinPackArguments: true

.editorconfig

@@ -0,0 +1,14 @@
+root = true
+
+[*]
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+end_of_line = lf
+
+[*.{c,cpp,h,hh,py,ts,js,java,m}]
+indent_style = space
+indent_size = 4
+
+[Makefile]
+indent_style = tab