Issue #2898947 by rajandro, jungle, ankit.singh, AkashkumarOSL, Lal_, shimpy, Saurabh_sgh, markdorison, gnikolovski, jordanwood, librarylasso, Swapnil_Kotwal, mrinalini9, chiranjeeb2410, codersukanta, daffie, xjm, alexpott, mmjvb, mparker17, MaskyS, larowlan, quietone: Change "writeable" to "writable" in documentation

Issue #3087531 by alexpott, jibran, gnikolovski, xjm, Mixologic: Use Diactoros LTS version 1.7, not 1.8 which is out of security coverage

Issue #2981889 by Nebel54, acbramley, timodwhit, bkosborne, fago, josephdpurcell, tim.plunkett, eiriksm, Sam152, grantkruger, shaal, gnikolovski: Performance Degradation in Layout Builder and other places likely