build: replace remaining "python setup.py install" with "pip install"

contrib/build-wine/build-electrum-git.sh

@@ -50,7 +50,7 @@ $PYTHON -m pip install -r ../../deterministic-build/requirements.txt
 $PYTHON -m pip install -r ../../deterministic-build/requirements-hw.txt
 
 pushd $WINEPREFIX/drive_c/electrum
-$PYTHON setup.py install
+$PYTHON -m pip install .
 popd
 
 cd ..

contrib/osx/make_osx

@@ -107,7 +107,7 @@ python3 -m pip install -Ir ./contrib/deterministic-build/requirements-hw.txt --u
 fail "Could not install hardware wallet requirements"
 
 info "Building $PACKAGE..."
-python3 setup.py install --user > /dev/null || fail "Could not build $PACKAGE"
+python3 -m pip install --user . > /dev/null || fail "Could not build $PACKAGE"
 
 info "Faking timestamps..."
 for d in ~/Library/Python/ ~/.pyenv .; do