Bump diffoscope from 237 to 256 in /requirements

Bumps [diffoscope](https://diffoscope.org/) from 237 to 256.

---
updated-dependencies:
- dependency-name: diffoscope
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements/dev-requirements.txt

@@ -11,11 +11,11 @@ attrs==22.2.0 \
 bandit==1.7.7 \
     --hash=sha256:17e60786a7ea3c9ec84569fd5aee09936d116cb0cb43151023258340dbffb7ed \
     --hash=sha256:527906bec6088cb499aae31bc962864b4e77569e9d529ee51df3a93b4b8ab28a
-    # via -r requirements/dev-requirements.in
+    # via -r dev-requirements.in
 black==21.12b0 \
     --hash=sha256:77b80f693a569e2e527958459634f18df9b0ba2625ba4e0c2d5da5be42e6f2b3 \
     --hash=sha256:a615e69ae185e08fdd73e4715e260e2479c861b5740057fde6e8b4e3b7dd589f
-    # via -r requirements/dev-requirements.in
+    # via -r dev-requirements.in
 build==0.10.0 \
     --hash=sha256:af266720050a66c893a6096a2f410989eeac74ff9a68ba194b3f6473e8e26171 \
     --hash=sha256:d5b71264afdb5951d6704482aac78de887c80691c52b88a9ad195983ca2c9269
@@ -26,9 +26,9 @@ click==8.0.3 \
     # via
     #   black
     #   pip-tools
-diffoscope==237 \
-    --hash=sha256:9ade0c8e43fc6edd89fe7c3c1bd5020d0cf6ec44fd120c7e3b887ebbee588a35
-    # via -r requirements/dev-requirements.in
+diffoscope==256 \
+    --hash=sha256:9937e3d70358d5cc00aa5fa8a3db9dd6be532a0d3cd2d064add2cda736a97c2a
+    # via -r dev-requirements.in
 distro==1.8.0 \
     --hash=sha256:02e111d1dc6a50abb8eed6bf31c3e48ed8b0830d1ea2a1b78c61765c2513fdd8 \
     --hash=sha256:99522ca3e365cac527b44bde033f64c6945d90eb9f769703caaec52b09bbd3ff
@@ -40,23 +40,23 @@ exceptiongroup==1.1.0 \
 flake8==4.0.1 \
     --hash=sha256:479b1304f72536a55948cb40a32dce8bb0ffe3501e26eaf292c7e60eb5e0428d \
     --hash=sha256:806e034dda44114815e23c16ef92f95c91e4c71100ff52813adf7132a6ad870d
-    # via -r requirements/dev-requirements.in
+    # via -r dev-requirements.in
 gitdb==4.0.10 \
     --hash=sha256:6eb990b69df4e15bad899ea868dc46572c3f75339735663b81de79b06f17eb9a \
     --hash=sha256:c286cf298426064079ed96a9e4a9d39e7f3e9bf15ba60701e95f5492f28415c7
     # via gitpython
 gitpython==3.1.32 \
     --hash=sha256:8d9b8cb1e80b9735e8717c9362079d3ce4c6e5ddeebedd0361b228c3a67a62f6 \
     --hash=sha256:e3d59b1c2c6ebb9dfa7a184daf3b6dd4914237e7488a1730a6d8f6f5d0b4187f
-    # via -r requirements/dev-requirements.in
+    # via -r dev-requirements.in
 iniconfig==2.0.0 \
     --hash=sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3 \
     --hash=sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374
     # via pytest
 isort==5.12.0 \
     --hash=sha256:8bef7dde241278824a6d83f44a544709b065191b95b6e50894bdc722fcba0504 \
     --hash=sha256:f84c2818376e66cf843d497486ea8fed8700b340f308f076c6fb1229dff318b6
-    # via -r requirements/dev-requirements.in
+    # via -r dev-requirements.in
 libarchive-c==4.0 \
     --hash=sha256:a5b41ade94ba58b198d778e68000f6b7de41da768de7140c984f71d7fa8416e5 \
     --hash=sha256:b7306dceaeeac199dd53a471ea9d39ed4be8e81962df99d628db7a12efbb9b52
@@ -100,7 +100,7 @@ mypy==1.0.0 \
     --hash=sha256:e0626db16705ab9f7fa6c249c017c887baf20738ce7f9129da162bb3075fc1af \
     --hash=sha256:f34495079c8d9da05b183f9f7daec2878280c2ad7cc81da686ef0b484cea2ecf \
     --hash=sha256:fe523fcbd52c05040c7bee370d66fee8373c5972171e4fbc323153433198592d
-    # via -r requirements/dev-requirements.in
+    # via -r dev-requirements.in
 mypy-extensions==0.4.3 \
     --hash=sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d \
     --hash=sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8
@@ -124,7 +124,7 @@ pbr==5.11.1 \
 pip-tools==6.12.2 \
     --hash=sha256:6a51f4fd67140d5e83703ebfa9610fb61398727151f56a1be02a972d062e4679 \
     --hash=sha256:8b903696df4598b10d469026ef9995c5f9a874b416e88e7a214884ebe4a70245
-    # via -r requirements/dev-requirements.in
+    # via -r dev-requirements.in
 platformdirs==2.4.1 \
     --hash=sha256:1d7385c7db91728b83efd0ca99a5afb296cab9d0ed8313a45ed8ba17967ecfca \
     --hash=sha256:440633ddfebcc36264232365d7840a970e75e1018d15b4327d11f91909045fda
@@ -152,7 +152,7 @@ pyproject-hooks==1.0.0 \
 pytest==7.2.1 \
     --hash=sha256:c7c6ca206e93355074ae32f7403e8ea12163b1163c976fee7d4d84027c162be5 \
     --hash=sha256:d45e0952f3727241918b8fd0f376f5ff6b301cc0777c6f9a556935c92d8a7d42
-    # via -r requirements/dev-requirements.in
+    # via -r dev-requirements.in
 python-magic==0.4.27 \
     --hash=sha256:c1ba14b08e4a5f5c31a302b7721239695b2f0f058d125bd5ce1ee36b9d9d3c3b \
     --hash=sha256:c212960ad306f700aa0d01e5d7a325d20548ff97eb9920dcd29513174f0294d3
@@ -201,7 +201,7 @@ pyyaml==6.0 \
     # via bandit
 reprotest==0.7.23 \
     --hash=sha256:c3508ee796219906a11eeda6f59897e631cc796fff6ea85d61d77d28c88f5c7f
-    # via -r requirements/dev-requirements.in
+    # via -r dev-requirements.in
 rich==13.7.0 \
     --hash=sha256:5cb5123b5cf9ee70584244246816e9114227e0b98ad9176eede6ad54bf5403fa \
     --hash=sha256:6da14c108c4866ee9520bbffa71f6fe3962e193b7da68720583850cd4548e235
@@ -243,7 +243,7 @@ pip==23.0.1 \
     --hash=sha256:236bcb61156d76c4b8a05821b988c7b8c35bf0da28a4b614e8d6ab5212c25c6f \
     --hash=sha256:cd015ea1bfb0fcef59d8a286c1f8bebcb983f6317719d415dc5351efb7cd7024
     # via
-    #   -r requirements/dev-requirements.in
+    #   -r dev-requirements.in
     #   pip-tools
 setuptools==67.4.0 \
     --hash=sha256:e5fd0a713141a4a105412233c63dc4e17ba0090c8e8334594ac790ec97792330 \