Pass version number to plugin. (#7925)

cli/types/cypress.d.ts

@@ -2526,6 +2526,10 @@ declare namespace Cypress {
     * Absolute path to the root of the project
     */
     projectRoot: string
+    /**
+     * Cypress version.
+     */
+    version: string
   }
 
   interface DebugOptions {

cli/types/tests/plugins-config.ts

@@ -13,6 +13,7 @@ const pluginConfig2: Cypress.PluginConfig = (on, config) => {
   config.screenshotsFolder // $ExpectType: string | false
   config.videoCompression // $ExpectType: number | false
   config.projectRoot // $ExpectType: string
+  config.version // $ExpectType: string
 
   on('before:browser:launch', (browser, options) => {
     browser.displayName // $ExpectType string