Don't let the "no tests found" message shadow the load error

When files fail to parse then it's likely no tests can be loaded, in that case
we need to show the error, not the generic "check your config" message.

bb_deps.edn

@@ -1,4 +1,4 @@
 {:deps
  {lambdaisland/open-source {:git/url "https://github.com/lambdaisland/open-source"
-                            :sha "55f81454a62b0688a0702735257cc5473f2f0c60"
+                            :sha "43ea822056ce84017639841ac082b9007a32d0f4"
                             #_#_:local/root "../open-source"}}}

src/kaocha/api.clj

@@ -98,7 +98,9 @@
           (with-bindings (config/binding-map config)
             (let [config (resolve-reporter config)]
               (let [test-plan (test-plan config)]
-                (when-not (some hierarchy/leaf? (testable/test-seq test-plan))
+                (when-not (some #(or (hierarchy/leaf? %)
+                                     (::testable/load-error %))
+                                (testable/test-seq test-plan))
                   (output/warn (str "No tests were found, make sure :test-paths and "
                                     ":ns-patterns are configured correctly in tests.edn."))
                   (throw+ {:kaocha/early-exit 0}))

test/unit/kaocha/version_check_test.clj

@@ -12,10 +12,8 @@
 
 (deftest current-version-does-not-throw
   (is (nil? (binding [*clojure-version* {:major 1 :minor 9}]
-        (v/check-version-minimum 1 9)))))
-
+              (v/check-version-minimum 1 9)))))
 
 (deftest version-2-does-not-throw
   (is (nil? (binding [*clojure-version* {:major 2 :minor 0}]
-        (v/check-version-minimum 1 9)))))
-
+              (v/check-version-minimum 1 9)))))