Objectbox Go Versions Save

• In-memory databases (provide a "directory" option like "memory:" + DB name)
• Update objectbox-c to v0.21.0 with many improvements (details)
• Fix leaking IDs with Box

Docs and previous changelogs: https://golang.objectbox.io/

Update objectbox-c to v0.18.1 with many improvements (details)

Docs and previous changelogs: https://golang.objectbox.io/

Fixes and minor improvements; for details please check https://golang.objectbox.io/

Update objectbox-c to v0.15.0 (details)

• update objectbox-c to v0.14.0
• add PropertyQuery support
• tested with Go 1.17

• add TimeSeries model definition support using id-companion and date-nano annotations
• avoid time.Duration.Milliseconds() not available on old Go Versions
• NewSyncClient - flip return values to align with the other "constructors"
• add NanoTimeInt64* built-in converters

• add ObjectBox Sync client support
• add self-assignable IDs: objectbox:"id(assignable)"
• add query GreaterOrEqual/LessOrEqual for ints and floats
• update objectbox-generator to v0.12.0
• update objectbox-c to v 0.13.0
• fix compiling on old gcc (e.g. the one in CentOS 7)

• update to objectbox-c v0.10.0 with latest improvements and fixes
• support comma in addition to space as an annotation separator
• extract code generation into a separate module/project objectbox-generator and depend on it to preserve existing go:generate annotations

• ensure Query finalizer is only executed by Go GC after a native call finishes

• Use temp directories in tests to prevent failure in recent Go versions checking-out modules as read-only.