* main: (21 commits)
  bpo-45876:  Have stdev() also use decimal specific square root. (pythonGH-29869)
  bpo-45876:  Correctly rounded stdev() and pstdev() for the Decimal case (pythonGH-29828)
  bpo-45711: Change exc_info related APIs to derive type and traceback from the exception instance (pythonGH-29780)
  bpo-30533:Add function inspect.getmembers_static that does not call properties or dynamic properties. (python#20911)
  bpo-45476: Disallow using asdl_seq_GET() as l-value (pythonGH-29866)
  bpo-45476: Add _Py_RVALUE() macro (pythonGH-29860)
  bpo-33381: [doc] strftime's %f option may pad zeros on the left or the right (pythonGH-29801)
  Fix EncodingWarning in Tools/freeze/test/freeze.py (pythonGH-29742)
  no-issue: remove unused import from test_graphlib.py (pythonGH-29853)
  bpo-45931: Prevent Directory.Build.props/targets from leaking from directories above the repo when building on Windows (pythonGH-29854)
  bpo-45653: fix test_embed on windows (pythonGH-29814)
  bpo-45917: Add math.exp2() method - return 2 raised to the power of x (pythonGH-29829)
  bpo-43905: Expand dataclasses.astuple() and asdict() docs (pythonGH-26154)
  bpo-44391: Remove unused argument from a varargs call. (pythonGH-29843)
  bpo-45881: configure --with-freeze-module --with-build-python (pythonGH-29835)
  bpo-45847: PY_STDLIB_MOD_SIMPLE now checks py_stdlib_not_available (pythonGH-29844)
  bpo-45828: Use unraisable exceptions within sqlite3 callbacks (FH-29591)
  bpo-40280: Emscripten systems use .wasm suffix by default (pythonGH-29842)
  bpo-45723: Sort the grand AC_CHECK_HEADERS check (pythonGH-29846)
  bpo-45847: Make socket module conditional (pythonGH-29769)
  ...