Revert "Update build-and-test.yml (#48)" (#51)

This reverts commit 2f7b00f3f403d131c15ee9014fbd572e29e3e8da.

.github/workflows/build-and-test.yml

diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 423d705..3012de5 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -1,6 +1,8 @@
 name: Build and test
 
 on:
+  push:
+    branches: [ "main" ]
   pull_request:
     branches: [ "main" ]