feature(test): set up Github Actions for CI

Author: sammyne

.circleci/config.yml

@@ -0,0 +1,28 @@
+# other reference: https://github.com/mvdan/github-actions-golang
+name: build
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        go:
+          - "1.15.1"
+    runs-on: ubuntu-18.04
+    container:
+      image: golang:${{ matrix.go }}
+
+    env:
+      CODECOV_TOKEN: 701e86bd-1c7e-43ee-903d-f73944e464c0 # for codecov
+    steps:
+      - uses: actions/checkout@v2
+      - name: Run tests
+        run: | # -race wouldn't be supported without gcc
+          go test -v -race $(go list ./... | grep -v /vendor/) -coverprofile=coverage.txt &&
+          bash <(curl -s https://codecov.io/bash)
+        shell: bash

.github/workflow/build.yml

@@ -1,5 +1,7 @@
 module github.com/sammyne/bip32
 
+go 1.15
+
 require (
 	github.com/btcsuite/btcd v0.0.0-20181013004428-67e573d211ac
 	github.com/btcsuite/btcutil v0.0.0-20180706230648-ab6388e0c60a