CI housekeeping

This PR ensures all CI jobs pass without errors.

List of changes:
- add support for OTP26/27 in CI
- bump actions/checkout
- drop support for OTP19 (not supported in official Docker image) from CI
- drop support for OTP20 (not supported by rebar3_hex) from CI
- fix test errors due to updated certs
- remove Travis CI config
- resolve dialyzer error of unknown function public_key:pem_decode/1 in
  OTP26/27

.github/workflows/erlang.yml

@@ -9,22 +9,17 @@ on:
       - master
 jobs:
   ci:
-    name: Run checks and tests over ${{matrix.otp_vsn}} and ${{matrix.os}}
-    runs-on: ${{matrix.os}}
+    name: OTP ${{matrix.otp}}
+    runs-on: ubuntu-latest
+    # enable this to test all OTP versions at once regardless the errors
+    # continue-on-error: true
     container:
-      image: erlang:${{matrix.otp_vsn}}
+      image: erlang:${{matrix.otp}}
     strategy:
       matrix:
-        otp_vsn: ["19.0", "19.3",
-                  "20.0", "20.1.7", "20.3.8.22",
-                  "21.0.9", "21.1.4", "21.2.7", "21.3.8.1",
-                  "22.0.7", "22.2.8", "22.3.4",
-                  "23.0.2", "23.2", "24"]
-        os: [ubuntu-latest]
+        otp: [21, 22, 23, 24, 25, 26, 27]
     steps:
-      - run: |
-          apt-get update
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: rebar3 --version
       - run: rebar3 eunit
       - run: rebar3 dialyzer

rebar.config

@@ -19,4 +19,9 @@
     {source_url, "https://github.com/certifi/erlang-certifi"},
     {assets, "assets"},
     {api_reference, true}
-]}.
+]}.
+
+%% Since OTP 26
+{dialyzer, [
+    {plt_extra_apps, [public_key]}
+]}.

test/certifi_tests.erl

@@ -10,9 +10,9 @@ reproducible_module_test() ->
 
 cacerts_test_() ->
     Certs = [Cert1, Cert2, Cert3 | _] = certifi:cacerts(),
-    [?_assertEqual(128, length(Certs))
-    ,?_assertMatch(<<48,130,5,192,48,130,3,168,160,3,2,1,2,2,16,30,191,89,80,184,_/binary>>, Cert1)
-    ,?_assertMatch(<<48,130,2,101,48,130,1,235,160,3,2,1,2,2,16,120,143,39,92,_/binary>>, Cert2)
-    ,?_assertMatch(<<48,130,5,239,48,130,3,215,160,3,2,1,2,2,8,13,211,227,188,_/binary>>, Cert3)
+    [?_assertEqual(147, length(Certs))
+    ,?_assertMatch(<<48,130,5,179,48,130,3,155,160,3,2,1,2,2,16,33,156,84,45,232,_/binary>>, Cert1)
+    ,?_assertMatch(<<48,130,2,66,48,130,1,201,160,3,2,1,2,2,16,54,58,150,140,_/binary>>, Cert2)
+    ,?_assertMatch(<<48,130,5,108,48,130,3,84,160,3,2,1,2,2,20,84,22,191,59,_/binary>>, Cert3)
     ,?_assertMatch(<<48,130,3,117,48,130,2,93,160,3,2,1,2,2,11,4,0,0,0,0,1,21,75,90,195,148,48,13,6,_/binary>>, lists:last(Certs))
     ].