Create CHANGELOG.md

Author: williaster

CHANGELOG.md

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+# Changelog
+
+- [v0.0.47](#v0047)
+
+## v0.0.47
+
+🎉 Finally syncing versions across packages! Will be easier to maintain the changelog :)
+
+📈 Enhancements
+- [sparkline] add support for tooltips #72 
+- [xy-chart] add support for area bands in <AreaSeries /> #71 
+- [shared] add package, move <WithTooltip /> all @data-ui packages to @data-ui/shared #72 
+
+📜 Documentation
+- [sparkline] update docs for tooltips
+
+🏋️ Internal
+- [xy-chart] absolute imports for all @vx components
+
+Changes:
+``` 
+ - @data-ui/theme: 0.0.9 => 0.0.47
+ - @data-ui/demo: 0.0.46 => 0.0.47 (private)
+ - @data-ui/event-flow: 0.0.11 => 0.0.47
+ - @data-ui/histogram: 0.0.8 => 0.0.47
+ - @data-ui/network: 0.0.6 => 0.0.47
+ - @data-ui/radial-chart: 0.0.11 => 0.0.47
+ - @data-ui/shared: 0.0.0 => 0.0.47
+ - @data-ui/sparkline: 0.0.3 => 0.0.47
+ - @data-ui/xy-chart: 0.0.25 => 0.0.47
+ ```