* Migrate read-receipts.spec.ts from Cypress to Playwright Signed-off-by: Michael Telatynski <7t3chguy@gmail.com> * Update client.ts * Serialise test message sending Signed-off-by: Michael Telatynski <7t3chguy@gmail.com> --------- Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>