Add forward compatibility with Cypress 10 (#233)

Author: michax

src/utils.js

@@ -6,7 +6,10 @@ function getFirstElement(jqueryOrElement) {
 }
 
 function getContainer(container) {
-  const subject = cy.state('subject')
+  // Cypress 10 deprecated cy.state('subject') usage and suggest to use new cy.currentSubject.
+  // https://docs.cypress.io/guides/references/changelog#10-5-0
+  // Below change ensures we do not get spam of warnings and are backward compatible with older cypress versions.
+  const subject = cy.currentSubject ? cy.currentSubject() : cy.state('subject');
   const withinContainer = cy.state('withinSubject')
 
   if (!subject && withinContainer) {