chore: Add PR title validation Github workflow (#80)

## Problem

Sometimes PRs are posted not following the [Conventional Commits spec](https://www.conventionalcommits.org/) so that we can use [`semantic-release`](https://github.com/semantic-release/semantic-release). We need to verify the PR titles and fail the PR if the title doesn't pass.


## Solution

Created a new Github workflow that uses the [`semantic-pull-request` Github action](https://github.com/marketplace/actions/semantic-pull-request) that validates the PR title on creation, edit, and synchronization.

Author: benmvp

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ name: CI
 on: [push, pull_request]
 
 jobs:
-  test:
+  main:
     name: Test (Node ${{ matrix.node }})
     runs-on: ubuntu-latest
 

.github/workflows/format.yml

@@ -1,4 +1,4 @@
-name: Format files
+name: Format
 
 on:
   push:
@@ -10,7 +10,7 @@ on:
       - master
 
 jobs:
-  prettier:
+  main:
     name: Format files
     runs-on: ubuntu-latest
 

.github/workflows/release.yml

@@ -6,8 +6,8 @@ on:
       - master
 
 jobs:
-  release:
-    name: Release
+  main:
+    name: NPM Release
     runs-on: ubuntu-latest
 
     steps:

.github/workflows/validate-pr.yml

@@ -0,0 +1,18 @@
+name: Pull Request
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+jobs:
+  main:
+    name: Validate PR
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Validate Pull Request title
+        uses: amannn/action-semantic-pull-request@v1.1.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}