Fix tsconfig for emotion-theming (#714)
Fix tsconfig for emotion-theming (#714)

**What**: tsconfig.json for emotion-theming package

**Why**: It does not work well with dtslint

**How**: Fix options in tsconfig.json

**Checklist**:
- [N/A] Documentation
- [N/A] Tests
- [x] Code complete

Resolves #711.
tkh44/emotion,tkh44/emotion,emotion-js/emotion,emotion-js/emotion,emotion-js/emotion,emotion-js/emotion