Use perl-versions in CI

.github/workflows/ci.yaml

@@ -1,20 +1,34 @@
 name: CI
 
 on: [push, pull_request]
+
 jobs:
+  perl-versions:
+    runs-on: ubuntu-latest
+    name: List Perl versions
+    outputs:
+      perl-versions: ${{ steps.action.outputs.perl-versions }}
+    steps:
+      - id: action
+        uses: perl-actions/perl-versions@v1
+        with:
+          since-perl: v5.8
+          with-devel: true
   test:
+    needs:
+      - perl-versions
     strategy:
       fail-fast: false
       matrix:
-        perl: [ '5.20', '5.22', '5.24', '5.26', '5.28', '5.30', '5.32', '5.34', '5.36', '5.36-threaded' ]
-        # See options here: https://hub.docker.com/_/perl/tags
+        perl-version: ${{ fromJson (needs.perl-versions.outputs.perl-versions) }}
 
     runs-on: ubuntu-latest
-    name: perl ${{matrix.perl}}
-    container: perl:${{matrix.perl}}
+    name: perl ${{matrix.perl-version}}
+    container:
+      image: perldocker/perl-tester:${{ matrix.perl-version }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Show perl version
       run: |
         perl -v
@@ -28,4 +42,4 @@ jobs:
       run: |
         perl Makefile.PL
         make
-        make test
+        make test

t/000.2-warn.t

@@ -2,6 +2,8 @@ use strict;
 use warnings;
 use Test::More tests => 1;
 use Data::Printer::Common;
+use File::Spec;
+my $dir_sep_char = File::Spec->catfile('', '');
 
 sub warnings(&) {
     my $code = shift;
@@ -15,4 +17,4 @@ sub warnings(&) {
 
 my $got = warnings { Data::Printer::Common::_warn(undef, "HA!") };
 
-is( $got, "[Data::Printer] HA! at t/000.2-warn.t line 16.\n", 'warn with proper caller/line' );
+is( $got, "[Data::Printer] HA! at t${dir_sep_char}000.2-warn.t line 18.\n", 'warn with proper caller/line' );

t/026-caller_message.t

@@ -1,6 +1,8 @@
 use strict;
 use warnings;
 use Test::More tests => 2;
+use File::Spec;
+my $dir_sep_char = File::Spec->catfile('', '');
 
 BEGIN {
     use Data::Printer::Config;
@@ -19,13 +21,13 @@ my $x;
 my $got = p $x;
 is(
     $got,
-    'Printing in line 19 of t/026-caller_message.t: undef',
+    "Printing in line 21 of t${dir_sep_char}026-caller_message.t: undef",
     'caller_info shows the proper caller message (after)'
 );
 
 $got = p $x, caller_message_position => 'after';
 is(
     $got,
-    'undef Printing in line 26 of t/026-caller_message.t:',
+    "undef Printing in line 28 of t${dir_sep_char}026-caller_message.t:",
     'caller_info shows the proper caller message (before)'
 );