Raise the minimum Elixir tested version to 1.14.0 (#4281)

Cannot test with Elixir 1.13.4 because its container image includes
Erlang/OTP 24.3 that ejabberd does not support anymore.

Author: badlop

.github/workflows/runtime.yml

@@ -169,7 +169,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        elixir: ['1.13', '1.14', '1.15', '1.16', '1.17', '1.18']
+        elixir: ['1.14', '1.15', '1.16', '1.17', '1.18']
     runs-on: ubuntu-24.04
     container:
       image: public.ecr.aws/docker/library/elixir:${{ matrix.elixir }}
@@ -292,7 +292,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        elixir: ['1.13', '1.14', '1.15', '1.16', '1.17', '1.18']
+        elixir: ['1.14', '1.15', '1.16', '1.17', '1.18']
     runs-on: ubuntu-24.04
     container:
       image: public.ecr.aws/docker/library/elixir:${{ matrix.elixir }}
@@ -349,7 +349,6 @@ jobs:
     - run: make dialyzer
 
     - run: make edoc
-      if: matrix.elixir >= '1.14'
 
     - name: Run rel
       run: |

COMPILE.md

@@ -28,8 +28,7 @@ Other optional libraries are:
 - PAM library, for Pluggable Authentication Modules (PAM)
 - ImageMagick's Convert program and Ghostscript fonts, for CAPTCHA
   challenges
-- Elixir ≥ 1.10.3, for Elixir support. It is recommended Elixir 1.13.4 or higher
-  and Erlang/OTP 23.0 or higher.
+- Elixir ≥ 1.10.3, for Elixir support. It is recommended Elixir 1.14.0 or higher
 
 If your system splits packages in libraries and development headers,
 install the development packages too.