0.7.2: SASL authentication fixes

• Fixed #6: Exception com.mongodb.Error (#40415:Location40415 "BSON field
  'saslContinue.done' is an unknown field.")
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• Fixed #7: Array to string conversion error in Document::toString()
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0.7.1: XP11 compatibility

• Made library compatible with XP 11 - @thekid

0.7.0: SSL / TLS support, PHP 8.1 fixes

• Fixed PHP 8.1 compatibility for IteratorAggregate / ArrayAccess return
  type declarations
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• Fixed issue #4: Cannot handle binary subtype 3 - @thekid
• Enable SSL/TLS if ssl=true or tls=true is passed in the connection
  string parameters; implements feature request #2
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• Made params for Collection::command() optional - @thekid

0.6.0: Simplified API

• Added Cursor::first() to return the first document (or NULL).
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• Made Collection::find() also accept IDs to find single documents
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• Added Collection::command() to run arbitrary commands - @thekid
• Simplified usage of collection methods update() and delete()
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0.5.3: Socket reading fix

• Fixed reading to ensure we have enough bytes when reading packets
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0.5.2: NULL fix

• Fixed error #22 (InvalidBSON) when using NULL values - @thekid

0.5.1: Aggregation fixes for transactions

• Rewrote count() and distinct() to use aggregation pipelines. See
  https://docs.mongodb.com/manual/core/transactions/#count-operation and
  https://docs.mongodb.com/manual/core/transactions/#distinct-operation
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0.5.0: Aggregation

• Added new methods Collection::distinct() and Collection::count()
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• Added new method Collection::aggregate() to perform aggregations, see
  https://docs.mongodb.com/manual/reference/command/aggregate/ and
  https://docs.mongodb.com/manual/reference/operator/aggregation/lookup/
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• Fixed all places where _id was assumed to always hold ObjectIds.
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0.4.0: Updates

• Merged PR #1: Implement update operation. Currently supports update operator
  expressions, replacement documents and pipelines will be added later.
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• Changed insert() to generate and return object IDs if not supplied in
  passed documents. Consistent with how most MongoDB drivers handle this, see
  https://docs.mongodb.com/manual/reference/method/db.collection.insert/#id-field
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0.3.1: Decimal128 fix

• Fixed large decimal128 number parsing from a string - @thekid