Continuous Integration test failing with no code change

[lukestanley]

The Karma unit tests are failing:

Error: src/app/blocks/load-schema-block/load-schema-block.component.ts:81:9 - error TS2322: Type '{ title: any; description: any; type: string; properties: {}; }' is not assignable to type 'never'.

81 schemaDefinitions[schemaName] = await this.mapSchema(schemaDefinitions, get(result, '[0].data', {}), schemaName, depth);
Error: src/app/blocks/load-schema-block/load-schema-block.component.ts:229:7 - error TS2322: Type 'any' is not assignable to type 'never'.

229 schemaDefinitions[embedSchemaName] = await this.resolveSchema(schemaDefinitions, embedSchemaName, depth + 1);

But no code change was made. Presumably, a dependency has changed.

Questions:

I presume that the schema is user defined, and that we can't have a type set for it - is this true?
Is there a sensible way to fix this type error?
If a dependency changed, where is the version for it set?
Should we put the dependency back as it was or do something else?