use github workflows instead of travis ci

Author: Chen Bin

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        emacs_version:
+          - 25.3
+          - 26.3
+          - 27.1
+          - snapshot
+    steps:
+    - uses: purcell/setup-emacs@master
+      with:
+        version: ${{ matrix.emacs_version }}
+
+    - uses: actions/checkout@v2
+
+    - name: Print emacs version
+      run: emacs --version
+
+    - name: Run tests
+      run: make test

.travis.yml

@@ -1,6 +1,6 @@
 * find-file-in-project
 
-[[https://travis-ci.org/redguardtoo/find-file-in-project][https://travis-ci.org/redguardtoo/find-file-in-project.svg?branch=master]]
+[[https://github.com/redguardtoo/find-file-in-project/actions/workflows/test.yml][https://github.com/redguardtoo/find-file-in-project/actions/workflows/test.yml/badge.svg]]
 [[http://melpa.org/#/find-file-in-project][file:http://melpa.org/packages/find-file-in-project-badge.svg]] [[http://stable.melpa.org/#/find-file-in-project][file:http://stable.melpa.org/packages/find-file-in-project-badge.svg]]
 
 Find file/directory and review Diff/Patch/Commit quickly everywhere.