This is causing diagnostics to not be cleared sometimes (see quick-lint#398), it
was first introduced for developement, because restarting Flymake
without changes in buffers would not delete old diagnostics, I think
it's fine if we not specify this option.

However I suspect this is a bug in Flymake.

Signed-off-by: wagner riffel <w@104d.net>
(cherry picked from commit 6a223f8)

Currently there is at least two customizeble variables per plugin,
using more than one plugin at time is annoying to configure, this
change generalize and centralize configuration in a single place.

This commit also adds configuration for searching quick-lint-js
executable, along with helper to find it under npm folder structure.

Signed-off-by: wagner riffel <w@104d.net>

Signed-off-by: wagner riffel <w@104d.net>

Signed-off-by: wagner riffel <w@104d.net>

Unlike M-x lsp, M-x lsp-quicklintjs doesn't prompt for a root folder.
It does this by always before calling (lsp) saving on its own state
file the buffer default directory as a project root.

Signed-off-by: wagner riffel <w@104d.net>

remove require on cl-seq not present in emacs24, cl-remove-if-not is
loaded by default.

Signed-off-by: wagner riffel <w@104d.net>

Signed-off-by: wagner riffel <w@104d.net>

Signed-off-by: wagner riffel <w@104d.net>

To avoid confusion, *-pkg.el files has a special meaning for Emacs packages.

Signed-off-by: wagner riffel <w@104d.net>