reorganize the library into three folders lib, contrib and core

Write unittests with pytest
Make all functions and method signatures as keyword only arguments

tests/unittests/test_ram.py

@@ -0,0 +1,22 @@
+from aiomql.lib.ram import RAM
+
+
+class TestRAM:
+    @classmethod
+    def setup_class(cls):
+        cls.ram = RAM(min_amount=5, max_amount=10, loss_limit=3, open_limit=5)
+
+    async def test_get_amount(self):
+        res = await self.ram.get_amount()
+        assert self.ram.min_amount <= res <= self.ram.max_amount
+
+    async def test_checks(self, buy_order, sell_order, mt):
+        for i in range(self.ram.open_limit+1):
+            if i % 2 == 0:
+                await mt.order_send(buy_order)
+            else:
+                await mt.order_send(sell_order)
+        res1 = await self.ram.check_losing_positions()
+        res2 = await self.ram.check_open_positions()
+        assert res2 is False
+        assert isinstance(res1, bool)