Update get crate logic based on commit history

.github/workflows/semver-check.yaml

@@ -4,9 +4,11 @@ on:
   push:
     branches: 
       - "main"
+      - "dev"
   pull_request:
     branches:  
       - "main"
+      - "dev"
 
 jobs:
   semver-check:
@@ -101,10 +103,18 @@ jobs:
       - name: Install cargo-semver-checks
         run: cargo install cargo-semver-checks --locked
 
+      - name: Fetch all branches
+        run: git fetch --all
+
+      - name: Identify target branch
+        id: target_branch
+        run: echo "::set-output name=branch::$(git rev-parse --abbrev-ref --symbolic-full-name @{u} | cut -d'/' -f2)"
+
       - name: Identify changed crates
         id: changes
         run: |
-          echo "::set-output name=changed_crates::$(git diff --name-only HEAD^ HEAD | grep '^crates/' | cut -d'/' -f2 | sort | uniq)"
+          TARGET_BRANCH=$(echo "${{ steps.target_branch.outputs.branch }}")
+          echo "::set-output name=changed_crates::$(git diff --name-only origin/$TARGET_BRANCH...HEAD | grep '^crates/' | cut -d'/' -f2 | sort | uniq)"
 
       - name: Run semver checks
         if: steps.changes.outputs.changed_crates