run tests independent of user nvim setup (#39)

* chore(lua_ls): now lua_ls knows about testing functions

* spec: change way how tests srtuctured

* test(config): refactor tests

* test: utils

* refactor(utils): remove not used function

* chore(ci): add test runner

* chore(ci): remove taskfile from deps

* fix: now it works

.luarc.json

@@ -0,0 +1,10 @@
+{
+    "diagnostics.globals": [
+        "describe",
+        "it",
+        "before_each",
+        "after_each",
+        "before_all",
+        "after_all"
+    ]
+}