added fixer for Standard

autoload/ale/fixers/standard.vim

@@ -0,0 +1,19 @@
+" Author: Sumner Evans <sumner.evans98@gmail.com>
+" Description: Fixing files with Standard.
+
+function! ale#fixers#standard#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'javascript_standard', [
+    \   'node_modules/standard/bin/cmd.js',
+    \   'node_modules/.bin/standard',
+    \])
+endfunction
+
+function! ale#fixers#standard#Fix(buffer) abort
+    let l:executable = ale#fixers#standard#GetExecutable(a:buffer)
+
+    return {
+    \   'command': ale#Escape(l:executable)
+    \       . ' --fix %t',
+    \   'read_temporary_file': 1,
+    \}
+endfunction