(typescript) fixing strictNullChecks=true issues (#2212)

packages/crdt/src/crdt/merkle.ts

packages/loot-core/src/client/actions/queries.ts

packages/loot-core/src/client/reducers/queries.ts

packages/loot-core/src/client/state-types/queries.d.ts

packages/loot-core/src/mocks/budget.ts

packages/loot-core/src/server/db/index.ts

packages/loot-core/src/shared/transactions.test.ts

packages/loot-core/src/shared/transactions.ts

packages/loot-core/src/shared/util.ts

packages/loot-core/src/types/models/payee.d.ts

tsconfig.json

upcoming-release-notes/2212.md