minor fixes to display logic

[kvjoshi]

This pull request updates the react-7-segment-display package with improvements to its fallback logic, display behavior, and project metadata. The most notable change is the switch of the default fallback character from - to 0, which affects how invalid or missing characters are rendered. Additionally, the visual appearance of inactive segments has been adjusted, and repository metadata has been updated to reflect a new maintainer.

Display logic improvements:

• Changed the default fallback character from - to 0 in Digit.tsx, so when an invalid or missing character is provided, the display will now show a zero instead of a dash. Added a warning log if the fallback is used, and improved error handling for invalid segment data. [1] [2]

Visual appearance adjustments:

• Updated the inactive segment style in Segment.tsx to use lower opacity and reduced grayscale, making inactive segments less prominent.

Project metadata updates:

• Updated the repository, bugs, and homepage URLs in package.json to point to the new maintainer (kvjoshi). [1] [2]
• Bumped the package version from 1.1.5 to 1.1.6 in package.json.
• Fixed a minor typo in the build script by removing an unnecessary space.