Enable "from __future__ import annotations" on unix build

ports/unix/variants/coverage/mpconfigvariant.mk

@@ -28,6 +28,7 @@ $(BUILD)/lib/quirc/lib/%.o: CFLAGS += -Wno-shadow -Wno-sign-compare -include sha
 SRC_BITMAP := \
 	shared/runtime/context_manager_helpers.c \
 	displayio_min.c \
+	shared-bindings/__future__/__init__.c \
 	shared-bindings/aesio/aes.c \
 	shared-bindings/aesio/__init__.c \
 	shared-bindings/audiocore/__init__.c \
@@ -85,6 +86,7 @@ CFLAGS += \
 	-DCIRCUITPY_AUDIOCORE_DEBUG=1 \
 	-DCIRCUITPY_BITMAPTOOLS=1 \
 	-DCIRCUITPY_DISPLAYIO_UNIX=1 \
+	-DCIRCUITPY_FUTURE=1 \
 	-DCIRCUITPY_GIFIO=1 \
 	-DCIRCUITPY_OS_GETENV=1 \
 	-DCIRCUITPY_RAINBOWIO=1 \

tests/unix/extra_coverage.py.exp

@@ -29,22 +29,22 @@ RuntimeError:
 ame__
 mport 
 
-builtins        micropython     _asyncio        _thread
+builtins        micropython     __future__      _asyncio
-_uasyncio       aesio           array           audiocore
+_thread         _uasyncio       aesio           array
-audiomixer      binascii        bitmaptools     btree
+audiocore       audiomixer      binascii        bitmaptools
-cexample        cmath           collections     cppexample
+btree           cexample        cmath           collections
-displayio       errno           ffi             framebuf
+cppexample      displayio       errno           ffi
-gc              hashlib         json            math
+framebuf        gc              hashlib         json
-qrio            rainbowio       re              struct
+math            qrio            rainbowio       re
-synthio         sys             termios         traceback
+struct          synthio         sys             termios
-ubinascii       uctypes         uerrno          uheapq
+traceback       ubinascii       uctypes         uerrno
-uio             ujson           ulab            ulab.numpy
+uheapq          uio             ujson           ulab
-ulab.numpy.fft  ulab.numpy.linalg               ulab.scipy
+ulab.numpy      ulab.numpy.fft  ulab.numpy.linalg
-ulab.scipy.linalg               ulab.scipy.optimize
+ulab.scipy      ulab.scipy.linalg
-ulab.scipy.signal               ulab.scipy.special
+ulab.scipy.optimize             ulab.scipy.signal
-ulab.utils      uos             urandom         ure
+ulab.scipy.special              ulab.utils      uos
-uselect         utime           utimeq          uzlib
+urandom         ure             uselect         utime
-zlib
+utimeq          uzlib           zlib
 ime
 
 utime           utimeq