Removed syntastic and replaced it with ale

Read more here:
https://github.com/w0rp/ale

sources_non_forked/ale/ale_linters/javascript/standard.vim

@@ -0,0 +1,30 @@
+" Author: Ahmed El Gabri <@ahmedelgabri>
+" Description: standardjs for JavaScript files
+
+call ale#Set('javascript_standard_executable', 'standard')
+call ale#Set('javascript_standard_use_global', 0)
+call ale#Set('javascript_standard_options', '')
+
+function! ale_linters#javascript#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_linters#javascript#standard#GetCommand(buffer) abort
+    let l:executable = ale_linters#javascript#standard#GetExecutable(a:buffer)
+    let l:options = ale#Var(a:buffer, 'javascript_standard_options')
+
+    return ale#node#Executable(a:buffer, l:executable)
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . ' --stdin %s'
+endfunction
+
+" standard uses eslint and the output format is the same
+call ale#linter#Define('javascript', {
+\   'name': 'standard',
+\   'executable_callback': 'ale_linters#javascript#standard#GetExecutable',
+\   'command_callback': 'ale_linters#javascript#standard#GetCommand',
+\   'callback': 'ale#handlers#eslint#Handle',
+\})