Properly declare the member functions

Function declaration using an arrow function in the global scope is
invalid, and the cleaner transpilation in Atom v1.16.0 breaks on this
method.

Author: Arcanemagus

lib/main.js

@@ -44,11 +44,11 @@ export default {
     },
   },
 
-  activate: () => {
+  activate() {
     require('atom-package-deps').install('linter-clang');
   },
 
-  provideLinter: () => {
+  provideLinter() {
     const helpers = require('atom-linter');
     const clangFlags = require('clang-flags');
     const regex = '(?<file>.+):(?<line>\\d+):(?<col>\\d+):({(?<lineStart>\\d+):(?<colStart>\\d+)-(?<lineEnd>\\d+):(?<colEnd>\\d+)}.*:)? (?<type>[\\w \\-]+): (?<message>.*)';