Update code style 👨🏻‍💻

1. Function wrapping changed, braces moved to new line.
2. Change the indentation of public and private to align with class.

Author: imliubo

.clang-format

@@ -1,7 +1,7 @@
 ---
 Language:        Cpp
 BasedOnStyle:  Google
-AccessModifierOffset: -1
+AccessModifierOffset: -4
 AlignAfterOpenBracket: Align
 AlignConsecutiveMacros: true
 AlignConsecutiveAssignments: true
@@ -29,7 +29,7 @@ BraceWrapping:
   AfterClass:      false
   AfterControlStatement: false
   AfterEnum:       false
-  AfterFunction:   false
+  AfterFunction:   true
   AfterNamespace:  false
   AfterObjCDeclaration: false
   AfterStruct:     false
@@ -42,7 +42,7 @@ BraceWrapping:
   SplitEmptyRecord: true
   SplitEmptyNamespace: true
 BreakBeforeBinaryOperators: None
-BreakBeforeBraces: Attach
+BreakBeforeBraces: Custom
 BreakBeforeInheritanceComma: false
 BreakInheritanceList: BeforeColon
 BreakBeforeTernaryOperators: true