fix: replace deprecated context.getFilename() with context.filename

Author: phanect

lib/base.js

@@ -25,13 +25,12 @@ module.exports.buildRule = ({ baseRuleName, description, omitFirstOption, getESL
     },
 
     create: function(context) {
-      const filename = context.getFilename();
-      const ecParams = editorconfig.parseSync(context.getFilename(filename));
+      const ecParams = editorconfig.parseSync(context.filename);
       const { enabled, eslintOption } = getESLintOption(ecParams);
 
       let baseRule;
 
-      if (filename.endsWith(".ts")) {
+      if (context.filename.endsWith(".ts")) {
         try {
           const { rules } = require("@typescript-eslint/eslint-plugin");
           baseRule = rules[baseRuleName] ? klona(rules[baseRuleName]) : jsBaseRule;