Fix potentially SSR issue

• Using fixed id for the SVG to replace the random id, issue raised from this discussion #51

v1.4.1

• fix face position when parent element has text-align:center

v1.4.0

Improvements

• Support ems
• Reduce bundle size
• Add source map supporting debug

By @lewisl9029

v1.3.1

• fix: user able to specify the hairstyle

v1.3.0

• Support generating avatar with a string of name, email, or whatever else

v1.2.4

New options

• isGradient: Boolean | Gradient background, default is false
• hatStyle: String | none, beanie, turban | usually is none
• hatColor: String
• glassesStyle: String | none, round, square | usually is none

New editor page