dust off testing #2

- replace Travis with github workflow, including Windows.
- not sure what's with appveyor. try to fix proejct link, as least

.github/workflows/test.yml

@@ -0,0 +1,34 @@
+name: test
+
+on:
+  push:
+    branches:
+      - '*'
+    tags-ignore:
+      - '*'
+  pull_request:
+
+jobs:
+  raku:
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - macOS-latest
+          - windows-latest
+        raku-version:
+          - 'latest'
+          - '2020.05.1'
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: Raku/setup-raku@v1
+        with:
+          raku-version: ${{ matrix.raku-version }}
+      - name: Install Dependencies
+        run: |
+          zef install --/test App::Prove6
+          zef install --deps-only .
+          zef build .
+      - name: Run Tests
+        run: prove6 -I. t

README.md

@@ -3,8 +3,8 @@ Base64-Native-p6
 
 Faster than average Base 64 encoding and decoding.
 
- <a href="https://travis-ci.org/pdf-raku/Base64-Native-raku"><img src="https://travis-ci.org/pdf-raku/Base64-Native-raku.svg?branch=master"></a>
- <a href="https://ci.appveyor.com/project/p6-pdf/Base64-Native-raku/branch/master"><img src="https://ci.appveyor.com/api/projects/status/github/pdf-raku/Base64-Native-raku?branch=master&passingText=Windows%20-%20OK&failingText=Windows%20-%20FAIL&pendingText=Windows%20-%20pending&svg=true"></a>
+[![Actions Status](https://github.com/pdf-raku/Base64-Native-raku/workflows/test/badge.svg)](https://github.com/pdf-raku/Base64-Native-raku/actions)
+<a href="https://ci.appveyor.com/project/dwarring/Base64-Native-raku"><img src="https://ci.appveyor.com/api/projects/status/github/raku-pdf/Base64-Native-raku?branch=master&passingText=Windows%20-%20OK&failingText=Windows%20-%20FAIL&pendingText=Windows%20-%20pending&svg=true"></a>
 
 ## Synopsis