doc: add 42.1.3 release notes
doc: add 42.1.3 release notes

panchenko/pgjdbc,jorsol/pgjdbc,AlexElin/pgjdbc,whitingjr/pgjdbc,pgjdbc/pgjdbc,AlexElin/pgjdbc,pgjdbc/pgjdbc,zapov/pgjdbc,davecramer/pgjdbc,jorsol/pgjdbc,lordnelson/pgjdbc,marschall/pgjdbc,AlexElin/pgjdbc,marschall/pgjdbc,marschall/pgjdbc,davecramer/pgjdbc,whitingjr/pgjdbc,golovnin/pgjdbc,panchenko/pgjdbc,jkutner/pgjdbc,zemian/pgjdbc,zapov/pgjdbc,davecramer/pgjdbc,sehrope/pgjdbc,zemian/pgjdbc,pgjdbc/pgjdbc,lordnelson/pgjdbc,jorsol/pgjdbc,panchenko/pgjdbc,jorsol/pgjdbc,jkutner/pgjdbc,davecramer/pgjdbc,zemian/pgjdbc,pgjdbc/pgjdbc,golovnin/pgjdbc,sehrope/pgjdbc,lordnelson/pgjdbc,jkutner/pgjdbc,sehrope/pgjdbc,marschall/pgjdbc,whitingjr/pgjdbc,golovnin/pgjdbc,zapov/pgjdbc,sehrope/pgjdbc