feat(typescript-estree): [TS4.3] support overrides on class members (#3429)

Author: bradzacher

packages/ast-spec/src/base/ClassPropertyBase.ts

@@ -21,6 +21,7 @@ interface ClassPropertyBase extends BaseNode {
   optional?: boolean;
   definite?: boolean;
   typeAnnotation?: TSTypeAnnotation;
+  override?: boolean;
 }
 
 export interface ClassPropertyComputedNameBase extends ClassPropertyBase {

packages/ast-spec/src/base/MethodDefinitionBase.ts

@@ -21,6 +21,7 @@ interface MethodDefinitionBase extends BaseNode {
   decorators?: Decorator[];
   accessibility?: Accessibility;
   typeParameters?: TSTypeParameterDeclaration;
+  override?: boolean;
 }
 
 export interface MethodDefinitionComputedNameBase extends MethodDefinitionBase {