requirements: Update mypy to latest version.

This involves fixing the mypy annotations in one file

requirements/dev_lock.txt

@@ -77,11 +77,11 @@ jmespath==0.9.3           # via boto3, botocore
 jsonpickle==0.9.5         # via aws-xray-sdk
 lxml==4.1.0
 markdown-include==0.5.1
-markdown==2.6.9
+markdown==2.6.9           # via markdown-include
 markupsafe==1.0
 mock==2.0.0
 moto==1.1.24
-mypy==0.530
+mypy==0.540
 mypy_extensions==0.3.0
 ndg-httpsclient==0.4.3
 oauth2client==4.1.2

requirements/mypy.txt

@@ -1,4 +1,4 @@
 # After editing this file, you MUST afterward run
 # /tools/update-locked-requirements to update requirements/dev_lock.txt.
 # See requirements/README.md for more detail.
-mypy==0.530
+mypy==0.540

requirements/prod_lock.txt

@@ -53,7 +53,7 @@ jedi==0.10.2              # via ipython
 jinja2==2.9.6
 lxml==4.1.0
 markdown-include==0.5.1
-markdown==2.6.9
+markdown==2.6.9           # via markdown-include
 markupsafe==1.0
 mock==2.0.0
 mypy_extensions==0.3.0
@@ -76,7 +76,7 @@ pyasn1-modules==0.1.5
 pyasn1==0.3.7
 pycparser==2.18           # via cffi
 pycrypto==2.6.1
-pygments==2.2.0
+pygments==2.2.0           # via ipython
 pyjwt==1.5.3
 pyldap==2.4.37
 pylibmc==1.5.2

version.py

@@ -1,2 +1,2 @@
 ZULIP_VERSION = "1.7.0+git"
-PROVISION_VERSION = '10.9'
+PROVISION_VERSION = '11.0'

zerver/lib/test_runner.py

@@ -238,7 +238,7 @@ def process_instrumented_calls(func):
     for call in test_helpers.INSTRUMENTED_CALLS:
         func(call)
 
-SerializedSubsuite = Tuple[Type[Iterable[TestCase]], List[str]]
+SerializedSubsuite = Tuple[Type['TestSuite'], List[str]]
 SubsuiteArgs = Tuple[Type['RemoteTestRunner'], int, SerializedSubsuite, bool]
 
 def run_subsuite(args):
@@ -514,9 +514,9 @@ def serialize_suite(suite):
     return type(suite), get_test_names(suite)
 
 def deserialize_suite(args):
-    # type: (Tuple[Type[Iterable[TestCase]], List[str]]) -> Iterable[TestCase]
+    # type: (Tuple[Type[TestSuite], List[str]]) -> TestSuite
     suite_class, test_names = args
-    suite = suite_class()  # type: ignore  # Gives abstract type error.
+    suite = suite_class()
     tests = TestLoader().loadTestsFromNames(test_names)
     for test in get_tests_from_suite(tests):
         suite.addTest(test)