travis -> github actions for CI testing

.Rbuildignore

@@ -1,4 +1,4 @@
 ^LICENSE\.md$
 ^Makefile$
-^\.travis\.yml$
 ^docs/
+^\.github$

.github/.gitignore

@@ -0,0 +1 @@
+*.html

.github/workflows/R-CMD-check.yaml

@@ -0,0 +1,30 @@
+# For help debugging build failures open an issue on the RStudio community with the 'github-actions' tag.
+# https://community.rstudio.com/new-topic?category=Package%20development&tags=github-actions
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+    branches:
+      - main
+      - master
+
+name: R-CMD-check
+
+jobs:
+  R-CMD-check:
+    runs-on: macOS-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: r-lib/actions/setup-r@v1
+      - name: Install dependencies
+        run: |
+          install.packages(c("remotes", "rcmdcheck"))
+          remotes::install_deps(dependencies = TRUE)
+        shell: Rscript {0}
+      - name: Check
+        run: rcmdcheck::rcmdcheck(args = "--no-manual", error_on = "error")
+        shell: Rscript {0}

README.md

@@ -1,6 +1,6 @@
 ## R/GNapi - R package to connect to the [GeneNetwork](http://gn2.genenetwork.org/) API
 
-[![Build Status](https://travis-ci.org/rqtl/GNapi.svg?branch=master)](https://travis-ci.org/rqtl/GNapi)
+[![R build status](https://github.com/rqtl/GNapi/workflows/R-CMD-check/badge.svg)](https://github.com/rqtl/GNapi/actions)
 
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