Code size & API improvements

Code size improvements via careful unchecked usage
API improvements via string.concat available in solc 0.8.12

Removed a dependency, and ran Slither tests

Converting to OpenZeppelin's Base64. Changes based on Slither analysis

0.9.7

Adding a DecimalStrings library that can print numbers with decimal places and with a negative sign

Switching to TypeScript and adding a new Randomization library

The SVG library was enhanced to provide more evenly-spread randomization. Plus, a new lightweight Randomization library was added to better support ERC-721 tokens that cannot rely on an Oracle such as the Chainlink VRF.

Note that the enums in ISVGTypes.sol have changed names

Enhancing documentation and SVG library

Updating code comments and improving the capabilities of random color generation, as well as removing an svg attribute that is deprecated

Enhancing SVG library to support more kinds of elements

0.9.3

Adding capabilities for more varied SVG elements

Demonstrating a withdraw function in SubscribableServiceMock

0.9.2

Added a withdraw function and updated unit tests

Adding a new service, plus ensuring unit tests cover 100%

0.9.1

Adding a new service. Also ensuring all unit tests cover 100% of code

Initial release

0.9.0

Correcting awkwardness in importing package