v1.26.0

• Added npm run dev command.
• Added tests for the DOM library. (glaszig)
• Added list of supported sharing services to READMEs.
• Added {url} placeholder to data-mail-body option. (stephankellermayr)
• Fixed Shariff to use data-title in favor of meta[name=DC.title] if present. (#143)
• Fixed Twitter popup opening twice when a tweet is embedded on a page. (Nebel54)
• Improved service initialization code. (#188)
• Made DOM element creation consistent. (#234)