End position in LSP range is exclusive

From LSP spec:

> A range in a text document expressed as (zero-based) start and end
> positions. A range is comparable to a selection in an editor. Therefore
> the end position is exclusive.

autoload/ale/lsp/response.vim

@@ -33,7 +33,7 @@ function! ale#lsp#response#ReadDiagnostics(response) abort
         \   'lnum': l:diagnostic.range.start.line + 1,
         \   'col': l:diagnostic.range.start.character + 1,
         \   'end_lnum': l:diagnostic.range.end.line + 1,
-        \   'end_col': l:diagnostic.range.end.character + 1,
+        \   'end_col': l:diagnostic.range.end.character,
         \}
 
         if l:severity == s:SEVERITY_WARNING