add tests, some fixes

requirements.txt

@@ -1,3 +1,18 @@
-pyTelegramBotAPI
-APScheduler~=3.10.4
-loguru~=0.7.2
+APScheduler==3.10.4
+certifi==2024.7.4
+charset-normalizer==3.3.2
+coverage==7.5.4
+exceptiongroup==1.2.1
+idna==3.7
+iniconfig==2.0.0
+loguru==0.7.2
+packaging==24.1
+pluggy==1.5.0
+pyTelegramBotAPI==4.20.0
+pytest==8.2.2
+pytz==2024.1
+requests==2.32.3
+six==1.16.0
+tomli==2.0.1
+tzlocal==5.2
+urllib3==2.2.2