Fix python requirement to include full 3.9 series. (#1142)

Also bump the 3.9 we test with in CI to 3.9.1.

Fixes #1141

.travis.yml

@@ -47,11 +47,12 @@ x-pyenv-install: &x-pyenv-install |
     rm -rf ${PYENV_ROOT}
     git clone https://github.com/pyenv/pyenv "${PYENV_ROOT}";
   fi
+  GIT_DIR="${PYENV_ROOT}/.git" git pull --ff-only
   "${PYENV}" install --keep --skip-existing ${PYENV_VERSION}
   "${PYENV}" global ${PYENV_VERSION}
 
 x-pyenv-39-env: &x-pyenv-39-env >
-  PYENV_VERSION=3.9.0
+  PYENV_VERSION=3.9.1
 
 x-linux-3-shard: &x-linux-39-shard
   <<: *x-linux-shard

pyproject.toml

@@ -24,7 +24,7 @@ classifiers = [
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
 ]
-requires-python = ">=2.7,<=3.9,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
+requires-python = ">=2.7,<3.10,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
 
 [tool.flit.metadata.requires-extra]
 # For improved subprocess robustness under python2.7.

tests/test_dist_metadata.py

@@ -55,10 +55,10 @@ def resolved_distribution(requirement):
 
 def test_requires_python():
     # type: () -> None
-    with resolved_distribution("pex==2.1.21") as dist:
-        assert SpecifierSet(
-            ">=2.7,<=3.9,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
-        ) == requires_python(dist)
+    with resolved_distribution("pip==20.3.1") as dist:
+        assert SpecifierSet(">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*") == requires_python(
+            dist
+        )
 
 
 def test_requires_python_none():

tests/test_integration.py

@@ -2434,7 +2434,7 @@ def test_resolve_arbitrary_equality_issues_940():
     with temporary_dir() as tmpdir, built_wheel(
         name="foo",
         version="1.0.2-fba4511",
-        python_requires=">=2.7,<=3.9,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*",
+        python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*",
     ) as whl:
         pex_file = os.path.join(tmpdir, "pex")
         results = run_pex_command(args=["-o", pex_file, whl])

tests/test_resolver.py

@@ -514,7 +514,7 @@ def test_resolve_arbitrary_equality_issues_940():
     dist = create_sdist(
         name="foo",
         version="1.0.2-fba4511",
-        python_requires=">=2.7,<=3.9,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*",
+        python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*",
     )
     resolved_distributions = local_resolve_multi(requirements=[dist])