[pgjdbc/pgjdbc] 4fa2d5: fix: backpatch2142 read notifies or errors that co...

  Branch: refs/heads/release/42.2
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: 4fa2d5bc1ed8c0086a3a197fc1c28f7173d53cac
      https://github.com/pgjdbc/pgjdbc/commit/4fa2d5bc1ed8c0086a3a197fc1c28f7173d53cac
  Author: Dave Cramer < >
  Date:   2021-05-31 (Mon, 31 May 2021)

  Changed paths:
    M pgjdbc/src/main/java/org/postgresql/core/v3/QueryExecutorImpl.java
    M pgjdbc/src/main/java/org/postgresql/util/PSQLState.java
    M pgjdbc/src/test/java/org/postgresql/test/jdbc2/CopyTest.java

  Log Message:
  -----------
  fix: backpatch2142 read notifies or errors that come in asynchronously after the ready for query (#2168)