CI: Add GitHub Actions workflow to build blinky with all variants.

Replace the README badge and remove the TravisCI config file.

.github/workflows/compile.yml

+name: Build
+
+on:
+  push:
+    branches: '*'
+  pull_request:
+    branches: '*'
+
+jobs:
+  compile:
+    strategy:
+      fail-fast: false
+      matrix:
+        variant:
+          - nRF52DK
+          - BluzDK
+          - RedBearLab_nRF51822:version=1_0
+          - BBCmicrobit
+          - BBCmicrobitV2
+          - CalliopeMini
+          - Generic_nRF51822:chip=xxac
+          - Generic_nRF52832
+          - Generic_nRF52833
+          - OSHChip
+          - STCT_nRF52_minidev
+          - PCA1000X:board_variant=pca10000
+          - PCA1000X:board_variant=pca10001
+          - PCA1000X:board_variant=nrf6310
+          - nRF51Dongle:version=1_1_0
+          - Blend2
+          - BLENano
+          - BLENano2
+          - TinyBLE
+          - bluey
+          - hackaBLE
+          - hackaBLE_v2
+          - Sinobit
+          - DWM1001-DEV
+          - SeeedArchLink
+          - Beacon_PCA20006
+          - Waveshare_BLE400
+          - ng_beacon
+    runs-on: ubuntu-latest
+    name: Compile ${{ matrix.variant }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Create blinky sketch to compile
+        run: |
+          mkdir blinky
+          cat > blinky/blinky.ino << EOF
+            void setup() {
+              pinMode(LED_BUILTIN, OUTPUT);
+            }
+
+            void loop() {
+              digitalWrite(LED_BUILTIN, HIGH);
+              delay(1000);
+              digitalWrite(LED_BUILTIN, LOW);
+              delay(1000);
+            }
+          EOF
+      - uses: arduino/compile-sketches@v1
+        with:
+          cli-version: latest
+          verbose: true
+          enable-deltas-report: true
+          platforms: |
+            # First we have to install this core so that the tooling is installed
+            - name: "sandeepmistry:nRF5"
+              source-url: "https://sandeepmistry.github.io/arduino-nRF5/package_nRF5_boards_index.json"
+              version: latest
+            # Now, this will overwrite the core source to use the local version
+            - name: "sandeepmistry:nRF5"
+              source-path: .
+          fqbn: "sandeepmistry:nRF5:${{ matrix.variant }}"
+          sketch-paths: blinky

.travis.yml

-language: generic
-addons:
-  apt:
-    packages:
-      - libc6:i386
-      - libstdc++6:i386
-env:
-  global:
-    - IDE_VERSION=1.8.5
-before_install:
-  - wget http://downloads.arduino.cc/arduino-$IDE_VERSION-linux64.tar.xz
-  - tar xf arduino-$IDE_VERSION-linux64.tar.xz
-  - mv arduino-$IDE_VERSION $HOME/arduino-ide
-  - export PATH=$PATH:$HOME/arduino-ide
-  - arduino --pref "boardsmanager.additional.urls=https://sandeepmistry.github.io/arduino-nRF5/package_nRF5_boards_index.json" --install-boards sandeepmistry:nRF5 > /dev/null
-  - buildExampleSketch() { arduino --verbose-build --verify --board $1 $HOME/arduino-ide/examples/$2/$3/$3.ino; }
-install:
-  - mkdir -p $HOME/Arduino/hardware/sandeepmistry
-  - ln -s $PWD $HOME/Arduino/hardware/sandeepmistry/nRF5
-script:
-  - buildExampleSketch sandeepmistry:nRF5:nRF52DK 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:BluzDK 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:BLENano:version=1_0 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:RedBearLab_nRF51822:version=1_0 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:BBCmicrobit 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:CalliopeMini 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:Generic_nRF51822:chip=xxac 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:Generic_nRF52832 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:OSHChip 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:STCT_nRF52_minidev 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:PCA1000X:board_variant=pca10000 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:PCA1000X:board_variant=pca10001 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:PCA1000X:board_variant=nrf6310 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:nRF51Dongle:version=1_1_0 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:Blend2 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:BLENano2 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:TinyBLE 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:bluey 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:hackaBLE 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:hackaBLE_v2 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:Sinobit 01.Basics BareMinimum
-  - buildExampleSketch sandeepmistry:nRF5:DWM1001-DEV 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:SeeedArchLink 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:Generic_nRF52833 01.Basics Blink
-  - buildExampleSketch sandeepmistry:nRF5:BBCmicrobitV2 01.Basics Blink

README.md

 # Arduino Core for Nordic Semiconductor nRF5 based boards
 
-[![Build Status](https://travis-ci.org/sandeepmistry/arduino-nRF5.svg?branch=master)](https://travis-ci.org/sandeepmistry/arduino-nRF5) [![OpenCollective](https://opencollective.com/arduino-nRF5/backers/badge.svg)](#backers)
+[![Build Status](https://github.com/sandeepmistry/arduino-nRF5/actions/workflows/compile.yml/badge.svg)](https://github.com/sandeepmistry/arduino-nRF5/actions/workflows/compile.yml) [![OpenCollective](https://opencollective.com/arduino-nRF5/backers/badge.svg)](#backers)
 [![OpenCollective](https://opencollective.com/arduino-nRF5/sponsors/badge.svg)](#sponsors)