Bump mongoose from 4.13.19 to 5.7.7 in /example/backend

[dependabot]

Bumps mongoose from 4.13.19 to 5.7.7.

Changelog

Sourced from mongoose's changelog.

5.7.7 / 2019-10-24

• fix(populate): make populate virtual consistently an empty array if local field is only empty arrays #8230
• fix(query): allow findOne(objectid) and find(objectid) #8268

5.7.6 / 2019-10-21

• fix: upgrade mongodb driver -> 3.3.3 to fix issue with failing to connect to a replica set if one member is down #8209
• fix(document): fix TypeError when setting a single nested subdoc with timestamps #8251
• fix(cursor): fix issue with long-running eachAsync() cursor #8249 #8235
• fix(connection): ensure repeated close events from useUnifiedTopology don't disconnect Mongoose from replica set #8224
• fix(document): support calling Document constructor directly in Node.js #8237
• fix(populate): add document array subpaths to parent doc populated() when calling DocumentArray#push() #8247
• fix(options): add missing minlength and maxlength to SchemaStringOptions #8256
• docs: add documentarraypath to API docs, including DocumentArrayPath#discriminator() #8164
• docs(schematypes): add a section about the type property #8227
• docs(api): fix Connection.close return param #8258 gosuhiman
• docs: update link to broken image on home page #8253 krosenk729

5.7.5 / 2019-10-14

• fix(query): delete top-level _bsontype property in queries to prevent silent empty queries #8222
• fix(update): handle subdocument pre('validate') errors in update validation #7187
• fix(subdocument): make subdocument#isModified use parent document's isModified #8223
• docs(index): add favicon to home page #8226
• docs: add schema options to API docs #8012
• docs(middleware): add note about accessing the document being updated in pre('findOneAndUpdate') #8218
• refactor: remove redundant code in ValidationError #8244 AbdelrahmanHafez

5.7.4 / 2019-10-09

• fix(schema): handle required: null and required: undefined as required: false #8219
• fix(update): support updating array embedded discriminator props if discriminator key in $elemMatch #8063
• fix(populate): allow accessing populate virtual prop underneath array when virtual defined on top level #8198
• fix(model): support passing options to Model.remove() #8211
• fix(document): handle Document#set() merge option when setting underneath single nested schema #8201
• fix: use options constructor class for all schematypes #8012

5.7.3 / 2019-09-30

• fix: make CoreMongooseArray#includes() handle fromIndex parameter #8203
• fix(update): cast right hand side of $pull as a query instead of an update for document arrays #8166
• fix(populate): handle virtual populate of an embedded discriminator nested path #8173
• docs(validation): remove deprecated isAsync from validation docs in favor of emphasizing promises #8184
• docs(documents): add overwriting section #8178
• docs(promises): add note about queries being thenable #8110
• perf: avoid update validators going into Mixed types #8192 birdofpreyru
• refactor: remove async as a prod dependency #8073

5.7.2 / 2019-09-23

... (truncated)

Commits

• 28e8ac4 chore: release 5.7.7
• f4bd463 fix(populate): make populate virtual consistently an empty array if local fie...
• ca4f52b test(populate): repro #8230
• ecd8242 docs(query): make note that filter param to find() can be an ObjectId re:...
• b03faf5 fix(query): allow findOne(objectid) and find(objectid)
• d7ceb89 test(query): repro #8268
• 068e57a chore: now working on 5.7.7
• 5656b4e chore: release 5.7.6
• fab4f5d test(schema): fix tests on node v4 and v5
• 29c5f1a fix(options): add missing minlength and maxlength to SchemaStringOptions
• Additional commits viewable in compare view

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