Bump msgpack from 0.5.6 to 0.6.0 (#5148)

Bumps [msgpack](https://github.com/msgpack/msgpack) from 0.5.6 to 0.6.0.
- [Release notes](https://github.com/msgpack/msgpack/releases)
- [Commits](https://github.com/msgpack/msgpack/commits)

Signed-off-by: dependabot[bot] <support@dependabot.com>

requirements/main.txt

@@ -325,16 +325,24 @@ markupsafe==1.1.0 \
 mistune==0.8.4 \
     --hash=sha256:59a3429db53c50b5c6bcc8a07f8848cb00d7dc8bdb431a4ab41920d201d4756e \
     --hash=sha256:88a1051873018da288eee8538d476dffe1262495144b33ecb586c4ab266bb8d4
-msgpack==0.5.6 \
-    --hash=sha256:0bae5d1538c5c6a75642f75a1781f3ac2275d744a92af1a453c150da3446138b \
-    --hash=sha256:0ee8c8c85aa651be3aa0cd005b5931769eaa658c948ce79428766f1bd46ae2c3 \
-    --hash=sha256:2ff43e3247a1e11d544017bb26f580a68306cec7a6257d8818893c1fda665f42 \
-    --hash=sha256:8767eb0032732c3a0da92cbec5ac186ef89a3258c6edca09161472ca0206c45f \
-    --hash=sha256:ab189a6365be1860a5ecf8159c248f12d33f79ea799ae9695fa6a29896dcf1d4 \
-    --hash=sha256:cfd6535feb0f1cf1c7cdb25773e965cc9f92928244a8c3ef6f8f8a8e1f7ae5c4 \
-    --hash=sha256:e274cd4480d8c76ec467a85a9c6635bbf2258f0649040560382ab58cabb44bcf \
-    --hash=sha256:f86642d60dca13e93260187d56c2bef2487aa4d574a669e8ceefcf9f4c26fd00 \
-    --hash=sha256:f8a57cbda46a94ed0db55b73e6ab0c15e78b4ede8690fa491a0e55128d552bb0
+msgpack==0.6.0 \
+    --hash=sha256:102802a9433dcf36f939b632cce9dea87310b2f163bb37ffc8bc343677726e88 \
+    --hash=sha256:3055c44f39833b6edb27fd48028dc7822d1fd75bfeef8a2434caed8d62bb24ee \
+    --hash=sha256:3b7fd45c8e9e537640f541d3699b1773cf5cb9345d4a75f93baa8f055084e59c \
+    --hash=sha256:64abc6bf3a2ac301702f5760f4e6e227d0fd4d84d9014ef9a40faa9d43365259 \
+    --hash=sha256:6e962c4adc7970af5a3d6a4f9bb87c617b1bd041fd9ab42355a263d421017ed9 \
+    --hash=sha256:72259661a83f8b08ef6ee83927ce4937f841226735824af5b10a536d886eeb36 \
+    --hash=sha256:78e297c3996fd9f35090fbddd1c148c2a71e0d6024500bcf3af90a4b9698bc19 \
+    --hash=sha256:85f1342b9d7549dd3daf494100d47a3dc7daae703cdbfc2c9ee7bbdc8a492cba \
+    --hash=sha256:8ce9f88b6cb75d74eda2a5522e5c2e5ec0f17fd78605d6502abb61f46b306865 \
+    --hash=sha256:8d0af8d64198e4b4f942a15ea9cb0dd9c4a0bd3e4e2ba57425e108bdbd4c3a0f \
+    --hash=sha256:9936ce3a530ca78db60b6631003b5f4ba383cfb1d9830a27d1b5c61857226e2f \
+    --hash=sha256:b688721df31c4bad6f508fb262719eb7e4a3532024c66d3c44ad6a4704519dda \
+    --hash=sha256:c28478328e9cd868ce54e8465eae9fa3605790450c66cc7e8bc416526917ef6e \
+    --hash=sha256:cb4e228f3d93779a1d77a1e9d72759b79dfa2975c1a5bd2a090eaa98239fa4b1 \
+    --hash=sha256:d03d0b6e4adf5bd1cbf7a81a20a56c883351947a57b7b85235181b057adf1120 \
+    --hash=sha256:d2b179faebd278e5f4e255a6bbc7ccb467f02ed5c4c00c8a68dc926002223a20 \
+    --hash=sha256:f1a8f7bd84be103979a73da57be3cb929d702a656162ee466597b816fa9eec97
 packaging==18.0 \
     --hash=sha256:0886227f54515e592aaa2e5a553332c73962917f2831f1b0f9b9f4380a4b9807 \
     --hash=sha256:f95a1e147590f204328170981833854229bb2912ac3d5f89e2a8ccd2834800c9