fix(formatting): specify parser for prettier-js to avoid errors

Some buffers which use markdown-mode or yaml mode yield errors when
using the prettier-js package to format them, as it looks at the file
extension by default to figure out what parser to use.

Some temporary files that use these modes don't have the correct file
extension, so prettier-js yields an error. My manually specifying the
correct "--parser" option for each major-mode, this is no longer an
issue.

modules/languages/siren-markdown.el

@@ -42,7 +42,8 @@
   :init
   (defun siren-markdown-mode-setup ()
     (setq-local markdown-asymmetric-header t
-                prettier-js-args '("--print-width" "80"
+                prettier-js-args '("--parser" "markdown"
+                                   "--print-width" "80"
                                    "--prose-wrap" "always")
                 whitespace-action nil)
 

modules/languages/siren-yaml.el

@@ -20,7 +20,8 @@
   :init
   (defun siren-yaml-mode-setup ()
     (run-hooks 'prog-mode-hook)
-    (setq tab-width 2)
+    (setq tab-width 2
+          prettier-js-args '("--parser" "yaml"))
     (prettier-js-mode)
     (subword-mode +1)))