Migrate from travis to github actions

Author: df7cb

.github/workflows/regression.yml

@@ -0,0 +1,41 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        shell: sh
+
+    strategy:
+      matrix:
+        pgversion:  [ 9.5, 9.6, 10, 11, 12, 13, 14 ]
+
+    env:
+      PGVERSION: ${{ matrix.pgversion }}
+
+    steps:
+    - name: checkout
+      uses: actions/checkout@v2
+
+    - name: install pg
+      run: |
+        sudo /usr/share/postgresql-common/pgdg/apt.postgresql.org.sh -v $PGVERSION -p -i
+        sudo -u postgres createuser -s "$USER"
+
+    - name: build
+      run: |
+        make PROFILE="-Werror"
+        sudo -E make install
+
+    - name: test
+      run: |
+        make installcheck
+
+    - name: show regression diffs
+      if: ${{ failure() }}
+      run: |
+        cat regression.diffs

.travis.yml

@@ -19,8 +19,6 @@ pre-built grammar files are used if only bison 2 is available).
 
 [Changelog](NEWS.md)
 
-[![Build Status](https://travis-ci.org/df7cb/postgresql-unit.svg?branch=master)](https://travis-ci.org/df7cb/postgresql-unit)
-
 Features
 --------