sized_context 1.0.0+4

Access MediaQuery sizing info directly on the context, also adds some helper methods for sizing and layout.

1.0.0+4

• Add tests
• Update linter rules

1.0.0-nullsafety

• Migrate to nnbd

0.2.1+1

• Fixed bug for diagonal inches

0.2.1

• Refactored percent api to: pctWidth and pctHeight

0.2.0+4

• Added conditional check for mobile platforms, using 150px/inch rather than 96
• Added fractional helper methods widthFraction and heightFraction

0.1.2

• Initial version