rename "check" test to "cli"

technically the corresponding item in the real code was renamed to
--lint, but that's the file we should use to write future tests.

test/cli.fnl

@@ -2,7 +2,7 @@
 
 ;; TODO refactor fennel-ls.check to avoid running end-to-end
 ;; (but keep/write at least some end-to-end tests)
-(fn test-check []
+(fn test-lint []
   (let [input-file-name (os.tmpname)]
     (doto (io.open input-file-name :w)
       (: :write "(local x 1)")
@@ -15,4 +15,4 @@
       (os.remove input-file-name))
     nil))
 
-{: test-check}
+{: test-lint}

test/init.fnl

@@ -27,4 +27,4 @@
        :test.code-action
        :test.rename
        :test.misc
-       :test.check]))
+       :test.cli]))