move swiper to peerdependency

[licanhua]

Fix #6746

swiper was in devdependency. it should be in dependency or peerdependency.

peerdependency is chosen because when I listed it as dependency, I hit:

Then I hit this compilation error for adaptivecards-react app:
              Field 'browser' doesn't contain a valid alias configuration
              c:\repo\adaptivecards\source\nodejs\node_modules\swiper.js doesn't exist
        c:\repo\adaptivecards\source\nodejs\node_modules\swiper doesn't exist
      c:\repo\adaptivecards\source\node_modules doesn't exist or is not a directory
      c:\repo\adaptivecards\node_modules doesn't exist or is not a directory
      c:\repo\node_modules doesn't exist or is not a directory
      c:\node_modules doesn't exist or is not a directory
@ ./node_modules/adaptivecards/lib/adaptivecards.js 25:13-34
@ ./src/adaptive-card.tsx 25:33-57
@ ./src/adaptivecards-react.ts 15:13-39

Microsoft Reviewers: Open in CodeFlow

[ghost]

Hi @licanhua. Thanks for helping make the AdaptiveCards JS renderer + tooling better. As additional verification, once the JS build succeeds, please go to the test site to test out your website/designer changes.