Remove travis-ci related files. Add github workflow. Fix warning on C…

…ocoa build

.github/workflows/ci.yml

@@ -0,0 +1,43 @@
+name: build
+on:
+  pull_request:
+  push:
+  release:
+    types: [published]
+
+jobs:
+  Build:
+    if: "!contains(github.event.head_commit.message, '[skip ci]')"
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        dc:
+          - ldc-latest
+          - dmd-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Setup D
+        uses: dlang-community/setup-dlang@v1
+        with:
+          compiler: ${{ matrix.dc }}
+
+      - name: Build and run example
+        run: |
+          dub build
+          dub --single examples/printdirs.d
+
+      - name: Build and run example with Cocoa
+        if: ${{ startsWith(matrix.os, 'macos') }}
+        run: |
+          dub build --config=cocoa
+          dub --single examples/printdirs.d --override-config=standardpaths/cocoa
+
+      - name: Run tests on xdg
+        if: ${{ startsWith(matrix.os, 'ubuntu') }}
+        run: |
+          dub test -b unittest

README.md

@@ -3,7 +3,7 @@
 D library for getting standard paths (e.g. Pictures, Music, Documents and also generic configuration and data paths). 
 Inspired by QStandardPaths from Qt.
 
-[![Build Status](https://travis-ci.org/FreeSlave/standardpaths.svg?branch=master)](https://travis-ci.org/FreeSlave/standardpaths) [![Windows Build Status](https://ci.appveyor.com/api/projects/status/github/FreeSlave/standardpaths?branch=master&svg=true)](https://ci.appveyor.com/project/FreeSlave/standardpaths)
+[![Build Status](https://github.com/FreeSlave/standardpaths/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/FreeSlave/standardpaths/actions/workflows/ci.yml) [![Windows Build Status](https://ci.appveyor.com/api/projects/status/github/FreeSlave/standardpaths?branch=master&svg=true)](https://ci.appveyor.com/project/FreeSlave/standardpaths)
 
 [Online documentation](http://freeslave.github.io/standardpaths/standardpaths.html)
 

source/standardpaths.d

@@ -692,6 +692,8 @@ version(Windows) {
     private {
         import std.string : fromStringz;
         version(StandardPathsCocoa) {
+            import core.attribute : selector;
+
             alias size_t NSUInteger;
 
             enum objectiveC_declarations = q{