Update Leptos deps

[sudo-shashank]

Summary of changes

Changes introduced in this pull request:

• Use leptos-rs v0.7.3

Reference issue to close (if applicable)

Closes #81

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code
  adheres to the team's
  documentation standards,
• I have added tests that prove my fix is effective or that my feature works
  (if possible),

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 112 lines in your changes missing coverage. Please review.

Project coverage is 10.70%. Comparing base (b8ea1c0) to head (2052724).
Report is 98 commits behind head on main.

Files with missing lines	Patch %	Lines
src/app.rs	0.00%	42 Missing ⚠️
src/faucet/controller.rs	0.00%	37 Missing ⚠️
src/faucet/views.rs	0.00%	14 Missing ⚠️
src/rpc_context.rs	0.00%	14 Missing ⚠️
src/lib.rs	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #108      +/-   ##
==========================================
- Coverage   11.04%   10.70%   -0.35%     
==========================================
  Files          25       25              
  Lines        1186     1224      +38     
==========================================
  Hits          131      131              
- Misses       1055     1093      +38     

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