Fix 'select' has no attribute 'epoll' error (#27)

* revert poetry.lock to older version to fix epoll error

* Add light smoke test to checks.yml

* Create pull_request_template.md

Author: erwin-wee

.github/pull_request_template.md

@@ -0,0 +1,5 @@
+## Description
+- <!--- Describe your changes -->
+
+## Issues Resolved
+- <!--- Describe the issues that have been resolved -->

.github/workflows/checks.yml

@@ -85,3 +85,8 @@ jobs:
       #----------------------------------------------
       - name: Run Isort
         run: poetry run isort --check .
+      #----------------------------------------------
+      #              run light smoke test
+      #----------------------------------------------
+      - name: Run Light Smoke Test
+        run: poetry run chainbench start --help