fix(cli): improve error handling in run test command

.github/workflows/ci.yml

@@ -81,6 +81,8 @@ jobs:
     runs-on: 'ubuntu-latest'
     steps:
       - uses: 'actions/checkout@v2'
+        with:
+          fetch-depth: 0
 
       - name: 'Use Docker'
         uses: 'actions-hub/docker/cli@master'

cli/services/GitAffected.ts

@@ -29,10 +29,14 @@ export class GitAffected implements GitAffectedOptions {
     base: string,
     head: string
   ): Promise<string[]> {
+    try {
       const { stdout } = await execa.command(
         `git diff --name-only --relative ${base} ${head}`
       )
       return this.parseGitOutput(stdout)
+    } catch {
+      return []
+    }
   }
 
   public async getUncommittedFiles (): Promise<string[]> {