Add exports field to fix webpack errors #268

Job	Run time
Compile source code and run tests (20.x, ubuntu-latest, src/tsconfig.json)	31s
Compile source code and run tests (20.x, ubuntu-latest, src/tsconfig.json)	31s
Compile source code and run tests (20.x, ubuntu-latest, src/tsconfig-es6.json)	31s
Compile source code and run tests (20.x, ubuntu-latest, src/tsconfig-es6.json)	31s
Compile source code and run tests (20.x, windows-latest, src/tsconfig.json)	1m 24s
Compile source code and run tests (20.x, windows-latest, src/tsconfig.json)	1m 24s
Compile source code and run tests (20.x, windows-latest, src/tsconfig-es6.json)	1m 25s
Compile source code and run tests (20.x, windows-latest, src/tsconfig-es6.json)	1m 25s
Compile source code and run tests (22.x, ubuntu-latest, src/tsconfig-es6.json)	32s
Compile source code and run tests (22.x, ubuntu-latest, src/tsconfig-es6.json)	32s
Compile source code and run tests (22.x, windows-latest, src/tsconfig.json)	1m 26s
Compile source code and run tests (22.x, windows-latest, src/tsconfig.json)	1m 26s
Compile source code and run tests (22.x, windows-latest, src/tsconfig-es6.json)	1m 1s
Compile source code and run tests (22.x, windows-latest, src/tsconfig-es6.json)	1m 1s
Upload coverage report to codecov	49s
Upload coverage report to codecov	52s
	15m 21s

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