fix(repentogon): unexported interfaces #6410

Job	Run time
get-lint-packages	3s
get-build-packages	6s
monorepo-lint	1m 2s
get-test-packages	4s
test (eslint-plugin-isaacscript)	40s
test (isaacscript-cli)	40s
lint (docs)	47s
lint (eslint-config-isaacscript)	45s
lint (eslint-plugin-isaacscript)	51s
lint (isaac-lua-polyfill)	43s
lint (isaac-typescript-definitions)	40s
lint (isaac-typescript-definitions-repentogon)	45s
lint (isaacscript-cli)	47s
lint (isaacscript-common)	1m 22s
lint (isaacscript-spell)	33s
build (docs)	33s
build (eslint-plugin-isaacscript)	44s
build (isaac-lua-polyfill)	34s
build (isaac-typescript-definitions)	43s
build (isaac-typescript-definitions-repentogon)	39s
build (isaacscript-cli)	39s
build (isaacscript-common)	1m 5s
Discord Failure Notification	0s
	14m 45s

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