requirements: Upgrade pip-tools to 4.1.0 and pip to 19.2.3.

Closes #13068.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

requirements/dev.in

@@ -50,7 +50,7 @@ transifex-client==0.12.5
 python-digitalocean==1.14.0
 
 # Needed for updating the locked pip dependencies
-pip-tools==3.8.0
+pip-tools==4.1.0
 
 # zulip's linting framework - zulint
 git+https://github.com/zulip/zulint@aaed679f1ad38b230090eadd3870b7682500f60c#egg=zulint==0.0.1

requirements/dev.txt

@@ -102,7 +102,7 @@ phonenumberslite==8.10.15
 pickleshare==0.7.5        # via ipython
 pika==0.13.0
 pillow==6.1.0
-pip-tools==3.8.0
+pip-tools==4.1.0
 polib==1.1.0
 premailer==3.5.0
 prompt-toolkit==1.0.16    # via ipython
@@ -191,5 +191,5 @@ git+https://github.com/zulip/python-zulip-api.git@804501610b6a205334e71b4e441fca
 git+https://github.com/zulip/python-zulip-api.git@804501610b6a205334e71b4e441fca60acf650da#egg=zulip_bots==0.6.1+git&subdirectory=zulip_bots
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==19.1.1
+pip==19.2.3
 setuptools==41.0.1        # via cfn-lint, ipython, jsonschema, markdown, pyhamcrest, sphinx, zope.interface

requirements/pip.txt

@@ -1,4 +1,4 @@
 # Dependencies for setting up pip to install our requirements.txt file.
-pip==19.1.1
+pip==19.2.3
 setuptools==41.0.1
 wheel==0.33.4

requirements/prod.txt

@@ -122,5 +122,5 @@ git+https://github.com/zulip/python-zulip-api.git@804501610b6a205334e71b4e441fca
 git+https://github.com/zulip/python-zulip-api.git@804501610b6a205334e71b4e441fca60acf650da#egg=zulip_bots==0.6.1+git&subdirectory=zulip_bots
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==19.1.1
+pip==19.2.3
 setuptools==41.0.1        # via ipython, markdown

requirements/unupgradable.json

@@ -14,12 +14,6 @@
     "transifex-client": {
         "issue": "https://github.com/zulip/zulip/issues/8914"
     },
-    "pip": {
-        "issue": "https://github.com/zulip/zulip/issues/13067"
-    },
-    "pip-tools": {
-        "issue": "https://github.com/zulip/zulip/issues/13067"
-    },
     "defusedxml": {
         "issue": "https://github.com/zulip/zulip/issues/12191"
     },

version.py

@@ -26,4 +26,4 @@ LATEST_RELEASE_ANNOUNCEMENT = "https://blog.zulip.org/2019/03/01/zulip-2-0-relea
 #   historical commits sharing the same major version, in which case a
 #   minor version bump suffices.
 
-PROVISION_VERSION = '49.2'
+PROVISION_VERSION = '49.3'