Merge pull request #35 from arichika/feature/v0.4.0b

fix up npm module's security updates

Author: arichika

README.md

@@ -6,6 +6,11 @@ Preview Sequence Diagrams (previewseqdiag-vscode) is an extension for vscode spe
 
 <img src="https://github.com/arichika/previewseqdiag-vscode/raw/main/assets/eye-catch.png" alt="eye-catch" width="480" />
 
+## New Features on 0.4.0
+
+* :tada: Save image As PNG/PNG*/JPG/SVG, Copy to Clpboard (PNG)
+* :tada: Force removal of unexpected vertical margins generated by mermaid's library.
+
 ## Features
 
 * Support to preview of Mermaid format.
@@ -14,7 +19,8 @@ Preview Sequence Diagrams (previewseqdiag-vscode) is an extension for vscode spe
   * For files with the `.msc` extension.
 * Save image As PNG/PNG*/JPG/SVG, Copy to Clpboard (PNG)
   * PNG*: The SVG data generated by mermaid's library does not include a background color. The 'PNG*' button to generate a PNG image with a specified background color as you see it.
-* Force removal of unexpected vertical margins generated by 
+* Force removal of unexpected vertical margins generated by mermaid and mscgen Preview libraries.
+  * ref: https://github.com/mermaid-js/mermaid/issues/1758
 
 ## Special feature