Merge pull request #199 from amazon-ion/update-iontests

Updates ion-tests and skip list.

Fix math/big.Int Does not Marshal (#194)

* fix mashalling of math/big.Int

* Revert BigIntType. It is not needed.

add UnmarshalJSON and MarshalJSON to Decimal (#191)

* add UnmarshalJSON and MarshalJSON to Decimal

* add more tests

Fix formatting

Adds support for decoding Timestamp to Time (#183)

adds a fix for timestamp fractional seconds that have positive expone…

…nt (#181)

* adds a fix for timestamp fractional seconds that have positive exponent

* adds binary reader test for timestamp fractional second with positive exponent

* fixes #180

go mod tidy for v1.1.1 (#179)

Removed beta status warning from README

go mod tidy for v1.0.1 (#168)

Remove passing tests from skip lists (#159)

Co-authored-by: Therapon Skoteiniotis <[email protected]>