test typescriptification - spec/unit/crypto/verification (#2673)
* renamed: spec/unit/crypto/verification/request.spec.js -> spec/unit/crypto/verification/request.spec.ts
* renamed: spec/unit/crypto/verification/qr_code.spec.js -> spec/unit/crypto/verification/qr_code.spec.ts
* renamed: spec/unit/crypto/verification/InRoomChannel.spec.js -> spec/unit/crypto/verification/InRoomChannel.spec.ts
* fix ts issues in InRoomChannel.spec
* renamed: spec/unit/crypto/verification/util.js -> spec/unit/crypto/verification/util.ts
* fix ts issues in util.t
* fix strict errors in util.ts
* js lint