Bump Elixir, OTP and PG versions

Author: angelsl

.github/workflows/cd.yml

@@ -24,8 +24,8 @@ jobs:
     env:
       MIX_ENV: prod
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      ELIXIR_VERSION: '1.13.2'
-      OTP_VERSION: '24.2'
+      ELIXIR_VERSION: '1.13.3'
+      OTP_VERSION: '24.2.1'
     steps:
       - uses: rlespinasse/github-slug-action@v3.x
       - uses: actions/checkout@v2

.github/workflows/ci.yml

@@ -23,11 +23,11 @@ jobs:
     env:
       MIX_ENV: test
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      ELIXIR_VERSION: '1.13.2'
-      OTP_VERSION: '24.2'
+      ELIXIR_VERSION: '1.13.3'
+      OTP_VERSION: '24.2.1'
     services:
       postgres:
-        image: postgres:13.1
+        image: postgres:14.2
         env:
           POSTGRES_USER: postgres
           POSTGRES_PASSWORD: postgres

README.md

@@ -17,9 +17,9 @@ Cadet is the web application powering Source Academy.
 
 ### System requirements
 
-1. Elixir 1.10.4
-2. Erlang/OTP 23.0.3
-3. PostgreSQL 11.8
+1. Elixir 1.13.3
+2. Erlang/OTP 23.2.1
+3. PostgreSQL 13 or 14
 
 It is probably okay to use a different version of PostgreSQL or Erlang/OTP, but
 using a different version of Elixir may result in differences in e.g. `mix