chore+refact: adding build workflows and badges

Author: rNoz

.github/workflows/build_elixir_latest.yml

@@ -0,0 +1,16 @@
+name: Build 1.18/otp-26
+
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+    branches:
+      - 'master'
+
+jobs:
+  elixir_otp_latest:
+    uses: ./.github/workflows/build_reusable.yml
+    with:
+      elixir-version: 1.18
+      otp-version: 26

.github/workflows/build_elixir_old.yml

@@ -0,0 +1,16 @@
+name: Build 1.13/otp-24
+
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+    branches:
+      - 'master'
+
+jobs:
+  elixir_otp_latest:
+    uses: ./.github/workflows/build_reusable.yml
+    with:
+      elixir-version: 1.13
+      otp-version: 24

.github/workflows/build_elixir_recent.yml

@@ -0,0 +1,16 @@
+name: Build 1.16/otp-25
+
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+    branches:
+      - 'master'
+
+jobs:
+  elixir_otp_latest:
+    uses: ./.github/workflows/build_reusable.yml
+    with:
+      elixir-version: 1.16
+      otp-version: 25

.github/workflows/build_reusable.yml

@@ -0,0 +1,30 @@
+name: Build CI Reusable
+
+on:
+  workflow_call:
+    inputs:
+      elixir-version:
+        required: true
+        type: string
+      otp-version:
+        required: true
+        type: string
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup Elixir
+        uses: erlef/setup-beam@v1
+        with:
+          elixir-version: ${{ inputs.elixir-version }}
+          otp-version: ${{ inputs.otp-version }}
+
+      - name: Install dependencies
+        run: mix deps.get
+
+      - name: Run compilation with warnings as errors
+        run: mix compile --warnings-as-errors

README.md

@@ -6,7 +6,7 @@
 
 ExImageInfo is an Elixir library to parse images (binaries) and get the dimensions (size), detected mime-type and overall validity for a set of image formats. It is the fastest and supports multiple formats.
 
-Online tools: [![Build Status](https://travis-ci.org/Group4Layers/ex_image_info.svg?branch=master)](https://travis-ci.org/Group4Layers/ex_image_info) [![Coverage Status](https://coveralls.io/repos/github/Group4Layers/ex_image_info/badge.svg?branch=master)](https://coveralls.io/github/Group4Layers/ex_image_info?branch=master) [![SourceLevel](https://app.sourcelevel.io/github/Group4Layers/-/ex_image_info.svg)](https://app.sourcelevel.io/github/Group4Layers/-/ex_image_info) [![Inline docs](http://inch-ci.org/github/Group4Layers/ex_image_info.svg)](http://inch-ci.org/github/Group4Layers/ex_image_info)
+Online tools: [![Elixir 1.18 / OTP 26](https://github.com/Group4Layers/ex_image_info/actions/workflows/build_elixir_latest.yml/badge.svg?branch=master)](https://github.com/Group4Layers/ex_image_info/actions/workflows/build_elixir_latest.yml) [![Elixir 1.16 / OTP 25](https://github.com/Group4Layers/ex_image_info/actions/workflows/build_elixir_recent.yml/badge.svg?branch=master)](https://github.com/Group4Layers/ex_image_info/actions/workflows/build_elixir_recent.yml) [![Elixir 1.13 / OTP 24](https://github.com/Group4Layers/ex_image_info/actions/workflows/build_elixir_old.yml/badge.svg)](https://github.com/Group4Layers/ex_image_info/actions/workflows/build_elixir_old.yml?branch=master) [![Coverage Status](https://coveralls.io/repos/github/Group4Layers/ex_image_info/badge.svg?branch=master)](https://coveralls.io/github/Group4Layers/ex_image_info?branch=master) [![Inline docs](http://inch-ci.org/github/Group4Layers/ex_image_info.svg)](http://inch-ci.org/github/Group4Layers/ex_image_info)
 
 ### [GitHub repo](https://github.com/Group4Layers/ex_image_info)    [Docs](https://group4layers.github.io/ex_image_info)    [Hex.pm package](https://hex.pm/packages/ex_image_info)