fix reportDeclaration not reporting multiple redeclarations of the same type

[DetachHead]

receclarations of the same time are always a mistake, even more so than redeclarations of different types (which you may sometimes want to do)

fixes #70

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

pyinstrument (https://github.com/joerick/pyinstrument)
+ /tmp/mypy_primer/projects/pyinstrument/pyinstrument/frame.py
+   /tmp/mypy_primer/projects/pyinstrument/pyinstrument/frame.py:58:5 - error: Declaration "attributes" is obscured by a declaration of the same name (reportRedeclaration)
- 41 errors, 5 warnings, 0 notes 
+ 42 errors, 5 warnings, 0 notes 

operator (https://github.com/canonical/operator)
+ /tmp/mypy_primer/projects/operator/ops/charm.py
+   /tmp/mypy_primer/projects/operator/ops/charm.py:1252:5 - error: Declaration "maintainers" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/operator/ops/charm.py:1292:5 - error: Declaration "relations" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/operator/ops/main.py
+   /tmp/mypy_primer/projects/operator/ops/main.py:160:9 - error: Declaration "args" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/operator/ops/main.py:168:9 - error: Declaration "args" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/operator/ops/model.py
+   /tmp/mypy_primer/projects/operator/ops/model.py:1451:5 - error: Declaration "app" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/operator/ops/model.py:1457:5 - error: Declaration "units" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/operator/ops/pebble.py:1794:17 - error: Declaration "body" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/operator/ops/pebble.py:2256:13 - error: Declaration "source_io" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/operator/ops/pebble.py:2258:13 - error: Declaration "source_io" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/operator/test/test_model.py:1230:5 - error: Declaration "errors" is obscured by a declaration of the same name (reportRedeclaration)
- 37 errors, 0 warnings, 0 notes 
+ 47 errors, 0 warnings, 0 notes 

steam.py (https://github.com/Gobot1234/steam.py)
+   /tmp/mypy_primer/projects/steam.py/steam/chat.py:510:5 - error: Declaration "app" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/steam.py/steam/protobufs/loyalty_rewards.py:150:5 - error: Declaration "total_points_given" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/steam.py/steam/protobufs/loyalty_rewards.py:151:5 - error: Declaration "total_points_received" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/steam.py/steam/types/manifest.py:44:5 - error: Declaration "steam_release_date" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/steam.py/steam/types/manifest.py:45:5 - error: Declaration "review_score" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/steam.py/steam/types/manifest.py:46:5 - error: Declaration "review_percentage" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/steam.py/steam/types/manifest.py:56:5 - error: Declaration "store_tags" is obscured by a declaration of the same name (reportRedeclaration)
- 8406 errors, 25 warnings, 0 notes 
+ 8413 errors, 25 warnings, 0 notes 

spack (https://github.com/spack/spack)
+   /tmp/mypy_primer/projects/spack/lib/spack/spack/report.py:39:5 - error: Declaration "specs" is obscured by a declaration of the same name (reportRedeclaration)
- 23863 errors, 78 warnings, 0 notes 
+ 23864 errors, 78 warnings, 0 notes 

pandas (https://github.com/pandas-dev/pandas)
+   /tmp/mypy_primer/projects/pandas/pandas/core/indexes/multi.py:313:5 - error: Declaration "_levels" is obscured by a declaration of the same name (reportRedeclaration)
- 1896 errors, 3 warnings, 0 notes 
+ 1897 errors, 3 warnings, 0 notes 

discord.py (https://github.com/Rapptz/discord.py)
+ /tmp/mypy_primer/projects/discord.py/discord/channel.py
+   /tmp/mypy_primer/projects/discord.py/discord/channel.py:190:14 - error: Declaration "_type" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/interactions.py:1068:13 - error: Declaration "payload" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/discord.py/discord/partial_emoji.py
+   /tmp/mypy_primer/projects/discord.py/discord/partial_emoji.py:100:9 - error: Declaration "id" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/discord.py/discord/raw_models.py
+   /tmp/mypy_primer/projects/discord.py/discord/raw_models.py:111:18 - error: Declaration "guild_id" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/raw_models.py:139:18 - error: Declaration "guild_id" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/raw_models.py:176:18 - error: Declaration "guild_id" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/raw_models.py:247:18 - error: Declaration "guild_id" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/raw_models.py:280:18 - error: Declaration "guild_id" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/raw_models.py:310:18 - error: Declaration "guild_id" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/raw_models.py:337:18 - error: Declaration "application_id" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/discord.py/discord/state.py
+   /tmp/mypy_primer/projects/discord.py/discord/state.py:197:14 - error: Declaration "application_flags" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/state.py:304:18 - error: Declaration "_messages" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/state.py:306:18 - error: Declaration "_messages" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/discord.py/discord/threads.py
+   /tmp/mypy_primer/projects/discord.py/discord/threads.py:184:14 - error: Declaration "_flags" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/threads.py:186:14 - error: Declaration "_applied_tags" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/discord.py/discord/widget.py
+   /tmp/mypy_primer/projects/discord.py/discord/widget.py:170:9 - error: Declaration "activity" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/discord.py/discord/app_commands/tree.py
+   /tmp/mypy_primer/projects/discord.py/discord/app_commands/tree.py:733:13 - error: Declaration "base" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/discord.py/discord/ext/commands/help.py
+   /tmp/mypy_primer/projects/discord.py/discord/ext/commands/help.py:1050:14 - error: Declaration "paginator" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/ext/commands/help.py:1340:14 - error: Declaration "paginator" is obscured by a declaration of the same name (reportRedeclaration)
+ /tmp/mypy_primer/projects/discord.py/discord/types/channel.py
+   /tmp/mypy_primer/projects/discord.py/discord/types/channel.py:108:5 - error: Declaration "owner_id" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/types/channel.py:110:5 - error: Declaration "last_message_id" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/discord.py/discord/types/channel.py:111:5 - error: Declaration "rate_limit_per_user" is obscured by a declaration of the same name (reportRedeclaration)
- 61 errors, 13 warnings, 0 notes 
+ 83 errors, 13 warnings, 0 notes 

dd-trace-py (https://github.com/DataDog/dd-trace-py)
+   /tmp/mypy_primer/projects/dd-trace-py/ddtrace/contrib/django/utils.py:292:9 - error: Declaration "request_headers" is obscured by a declaration of the same name (reportRedeclaration)
- 7988 errors, 468 warnings, 0 notes 
+ 7989 errors, 468 warnings, 0 notes 

freqtrade (https://github.com/freqtrade/freqtrade)
+   /tmp/mypy_primer/projects/freqtrade/freqtrade/edge/edge_positioning.py:46:5 - error: Declaration "_cached_pairs" is obscured by a declaration of the same name (reportRedeclaration)
- 491 errors, 39 warnings, 0 notes 
+ 492 errors, 39 warnings, 0 notes 

hydra-zen (https://github.com/mit-ll-responsible-ai/hydra-zen)
+   /tmp/mypy_primer/projects/hydra-zen/src/hydra_zen/funcs.py:55:9 - error: Declaration "unresolved_wrappers" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/hydra-zen/src/hydra_zen/structured_configs/_implementations.py:2545:13 - error: Declaration "target_has_valid_signature" is obscured by a declaration of the same name (reportRedeclaration)
- 150 errors, 0 warnings, 183 notes 
+ 152 errors, 0 warnings, 183 notes 

materialize (https://github.com/MaterializeInc/materialize)
+   /tmp/mypy_primer/projects/materialize/misc/python/materialize/scalability/plot/plot.py:230:9 - error: Declaration "plot" is obscured by a declaration of the same name (reportRedeclaration)
+   /tmp/mypy_primer/projects/materialize/misc/python/materialize/scalability/plot/plot.py:234:9 - error: Declaration "plot" is obscured by a declaration of the same name (reportRedeclaration)
- 10 errors, 311 warnings, 0 notes 
+ 12 errors, 311 warnings, 0 notes