Update dependencies

@babel/core                                  7.9.6  →   7.10.3
 @babel/plugin-proposal-class-properties      7.8.3  →   7.10.1
 @babel/plugin-proposal-decorators            7.8.3  →   7.10.3
 @babel/plugin-proposal-object-rest-spread    7.9.6  →   7.10.3
 @babel/plugin-syntax-class-properties        7.8.3  →   7.10.1
 @babel/plugin-syntax-decorators              7.8.3  →   7.10.1
 @babel/preset-env                            7.9.6  →   7.10.3
 @babel/preset-react                          7.9.4  →   7.10.1
 acorn                                       ^7.2.0  →   ^7.3.1
 autoprefixer                                ^9.8.0  →   ^9.8.4
 chalk                                       ^4.0.0  →   ^4.1.0
 sharp                                      ^0.25.3  →  ^0.25.4
 svelte                                     ^3.22.3  →  ^3.23.2
 typescript                                   3.9.3  →    3.9.5
 mocha                                       ^7.2.0  →   ^8.0.1