fix(inspector): Preserve floating point precision from inspector response

[Tango992]

Fixes denoland/deno#29059

Messages from the inspector that hold a number value can result in the loss of floating point precision when deserialized.

When a user sends 0.9999999999999999 in the REPL, V8 returns a RemoteObject that contains the field "value": 0.9999999999999999. However, when it's deserialized into serde_json::Value here:

deno_core/core/inspector.rs

Lines 883 to 884 in fc1ef37

	let message: serde_json::Value =
	match serde_json::from_str(&inspector_msg.content) {

value becomes serde_json::Number(1.0), causing the REPL to print 1. Enabling the float_roundtrip feature flag of serde json resolves this.

Before:

After:

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.69%. Comparing base (0c7f83e) to head (db8bd12).
Report is 307 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1141      +/-   ##
==========================================
+ Coverage   81.43%   81.69%   +0.25%     
==========================================
  Files          97      100       +3     
  Lines       23877    28957    +5080     
==========================================
+ Hits        19445    23657    +4212     
- Misses       4432     5300     +868     

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[bartlomieju]

LGTM, sweet fix 👍