Bump protobuf from 3.11.3 to 3.18.3 in /examples/doc_scan

examples/doc_scan/requirements.txt

@@ -4,31 +4,59 @@
 #
 #    pip-compile --output-file=requirements.txt requirements.in
 #
-asn1==2.2.0               # via yoti
-certifi==2020.4.5.1       # via requests
-cffi==1.14.0              # via cryptography
-chardet==3.0.4            # via requests
-click==7.1.2              # via flask
-cryptography==3.2         # via pyopenssl, yoti
-deprecated==1.2.10        # via yoti
-filetype==1.0.7           # via -r requirements.in
-flask==1.1.2              # via -r requirements.in
-future==0.18.2            # via yoti
-idna==2.9                 # via requests
-iso8601==0.1.13           # via yoti
-itsdangerous==1.1.0       # via flask
-jinja2==2.11.2            # via flask
-markupsafe==1.1.1         # via jinja2
-protobuf==3.11.3          # via yoti
-pycparser==2.20           # via cffi
-pyopenssl==19.1.0         # via -r requirements.in, yoti
-python-dotenv==0.13.0     # via -r requirements.in
-requests==2.23.0          # via yoti
-six==1.14.0               # via cryptography, protobuf, pyopenssl
-urllib3==1.25.9           # via requests
-werkzeug==1.0.1           # via flask
-wrapt==1.12.1             # via deprecated
-yoti==2.13.0              # via -r requirements.in
-
-# The following packages are considered to be unsafe in a requirements file:
-# setuptools
+asn1==2.2.0
+    # via yoti
+certifi==2020.4.5.1
+    # via requests
+cffi==1.14.0
+    # via cryptography
+chardet==3.0.4
+    # via requests
+click==7.1.2
+    # via flask
+cryptography==3.2
+    # via
+    #   pyopenssl
+    #   yoti
+deprecated==1.2.10
+    # via yoti
+filetype==1.0.7
+    # via -r requirements.in
+flask==1.1.2
+    # via -r requirements.in
+future==0.18.2
+    # via yoti
+idna==2.9
+    # via requests
+iso8601==0.1.13
+    # via yoti
+itsdangerous==1.1.0
+    # via flask
+jinja2==2.11.2
+    # via flask
+markupsafe==1.1.1
+    # via jinja2
+protobuf==3.18.3
+    # via yoti
+pycparser==2.20
+    # via cffi
+pyopenssl==19.1.0
+    # via
+    #   -r requirements.in
+    #   yoti
+python-dotenv==0.13.0
+    # via -r requirements.in
+requests==2.23.0
+    # via yoti
+six==1.14.0
+    # via
+    #   cryptography
+    #   pyopenssl
+urllib3==1.25.9
+    # via requests
+werkzeug==1.0.1
+    # via flask
+wrapt==1.12.1
+    # via deprecated
+yoti==2.13.0
+    # via -r requirements.in