message: backend-common: Update tests with new envVars format
diff: @@ -159,7 +159,7 @@ describe('CookieCutter Templater', () => {
  '/input',
  '--verbose',
  ],
  - envVars: ['HOME=/tmp'],
  + envVars: { HOME: '/tmp' },
  mountDirs: {
  [path.join('tempdir', 'template')]: '/input',
  [path.join('tempdir', 'intermediate')]: '/output',
  @@ -202,7 +202,7 @@ describe('CookieCutter Templater', () => {
  '/input',
  '--verbose',
  ],
  - envVars: ['HOME=/tmp'],
  + envVars: { HOME: '/tmp' },
  mountDirs: {
  [path.join('tempdir', 'template')]: '/input',
  [path.join('tempdir', 'intermediate')]: '/output',
  