build(deps): bump bleach from 3.1.2 to 3.1.4 in /examples

Bumps [bleach](https://github.com/mozilla/bleach) from 3.1.2 to 3.1.4.
- [Release notes](https://github.com/mozilla/bleach/releases)
- [Changelog](https://github.com/mozilla/bleach/blob/master/CHANGES)
- [Commits](https://github.com/mozilla/bleach/compare/v3.1.2...v3.1.4)

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

examples/Pipfile.lock

@@ -32,11 +32,11 @@
         },
         "bleach": {
             "hashes": [
-                "sha256:2ffa40dfa80b141ff58eee538bce0d2a09c7d456018d00f7a2cb0ebf967c524d",
+                "sha256:cc8da25076a1fe56c3ac63671e2194458e0c4d9c7becfd52ca251650d517903c",
-                "sha256:f0b1ee0315062e60afa6b7cc39b1c3718b591e1d552a8841044dc49a68465659"
+                "sha256:e78e426105ac07026ba098f04de8abe9b6e3e98b5befbf89b51a5ef0a4292b03"
             ],
             "index": "pypi",
-            "version": "==3.1.2"
+            "version": "==3.1.4"
         },
         "cycler": {
             "hashes": [
@@ -114,10 +114,10 @@
         },
         "jupyter-client": {
             "hashes": [
-                "sha256:589dcfb409717cc1baaae5e3d2f7b7f5920763bf039adf4a741aee17e44947af",
+                "sha256:5724827aedb1948ed6ed15131372bc304a8d3ad9ac67ac19da7c95120d6b17e0",
-                "sha256:61429e7d2c4b385135d31054944dd3f23a1c6affb0ca3d4328d42fc9ba82b7f5"
+                "sha256:81c1c712de383bf6bf3dab6b407392b0d84d814c7bd0ce2c7035ead8b2ffea97"
             ],
-            "version": "==6.1.0"
+            "version": "==6.1.2"
         },
         "jupyter-core": {
             "hashes": [
@@ -342,10 +342,10 @@
         },
         "prompt-toolkit": {
             "hashes": [
-                "sha256:859e1b205b6cf6a51fa57fa34202e45365cf58f8338f0ee9f4e84a4165b37d5b",
+                "sha256:563d1a4140b63ff9dd587bda9557cffb2fe73650205ab6f4383092fb882e7dc8",
-                "sha256:ebe6b1b08c888b84c50d7f93dee21a09af39860144ff6130aadbd61ae8d29783"
+                "sha256:df7e9e63aea609b1da3a65641ceaf5bc7d05e0a04de5bd45d05dbeffbabf9e04"
             ],
-            "version": "==3.0.4"
+            "version": "==3.0.5"
         },
         "ptyprocess": {
             "hashes": [
@@ -371,9 +371,9 @@
         },
         "pyrsistent": {
             "hashes": [
-                "sha256:cdc7b5e3ed77bed61270a47d35434a30617b9becdf2478af76ad2c6ade307280"
+                "sha256:28669905fe725965daa16184933676547c5bb40a5153055a8dee2a4bd7933ad3"
             ],
-            "version": "==0.15.7"
+            "version": "==0.16.0"
         },
         "python-dateutil": {
             "hashes": [