fix: use Object.prototype.hasOwnProperty

[nolanlawson]

After reading https://eslint.org/docs/rules/no-prototype-builtins, I realized I was doing this slightly wrong. Although it probably doesn't matter, and it's probably safe to use this.hasOwnProperty. But I guess to play it safe I'll abide by the rule.

[github-actions]

📊 Tachometer Benchmark Results

Summary

benchmark-total

• emoji-picker-element-first-load: unsure 🔍 -8% - +8% (-6.75ms - +7.08ms)
  ^{this-change vs tip-of-tree}
• emoji-picker-element-second-load: unsure 🔍 -9% - +3% (-7.91ms - +2.42ms)
  ^{this-change vs tip-of-tree}

Results

emoji-picker-element-first-load

• Browser: chrome-headless 92.0.4515.107
• Sample size: 50
• Built by: Benchmarks #77

• Commit: 62060dc

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	79.45ms - 89.24ms	-	unsure 🔍 -8% - +8% -6.75ms - +7.08ms
tip-of-tree tip-of-tree	79.30ms - 89.06ms	unsure 🔍 -8% - +8% -7.08ms - +6.75ms	-

emoji-picker-element-second-load

• Browser: chrome-headless 92.0.4515.107
• Sample size: 90
• Built by: Benchmarks #77

• Commit: 62060dc

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	80.53ms - 87.75ms	-	unsure 🔍 -9% - +3% -7.91ms - +2.42ms
tip-of-tree tip-of-tree	83.20ms - 90.58ms	unsure 🔍 -3% - +10% -2.42ms - +7.91ms	-

_{tachometer-reporter-action v2 for Benchmarks}

[github-actions]

Size Change: +10 B (0%)

Total Size: 41.6 kB

Filename	Size	Change
./bundle.js	41.6 kB	+10 B (0%)

_{compressed-size-action}