Bump elliptic from 6.5.4 to 6.6.0 in /demo13

Bump elliptic from 6.5.4 to 6.5.7 in /demo13

Merge pull request #99 from ruanyf/dependabot/npm_and_yarn/demo13/bro…

Bump browserify-sign from 4.0.4 to 4.2.2 in /demo13

Bump fsevents from 1.2.4 to 1.2.13 in /demo13

Merge pull request #95 from usmanaliqureshi/readme_update

Merge pull request #93 from ritchiels/rich-contrib

Bump set-value and union-value in /demo13

Bump ini from 1.3.5 to 1.3.8 in /demo13

Bump tar from 4.4.1 to 4.4.19 in /demo13

Bump chownr from 1.0.1 to 1.1.4 in /demo13