Update dependencies to fix vulnerability (#20)

* Update dependencies to fix vulnerability

run `npm update`

update ws

update express

update webpack

* update express into 4.21.1

npm audit report

body-parser  <1.20.3
Severity: high
body-parser vulnerable to denial of service when url encoding is enabled - GHSA-qwcr-r2fm-qrc7
fix available via `npm audit fix --force`
Will install express@4.21.1, which is outside the stated dependency range
node_modules/body-parser
  express  <=4.21.0 || 5.0.0-alpha.1 - 5.0.0
  Depends on vulnerable versions of body-parser
  Depends on vulnerable versions of cookie
  Depends on vulnerable versions of path-to-regexp
  Depends on vulnerable versions of send
  Depends on vulnerable versions of serve-static
  node_modules/express

cookie  <0.7.0
cookie accepts cookie name, path, and domain with out of bounds characters - GHSA-pxg6-pf52-xh8x
fix available via `npm audit fix --force`
Will install express@4.21.1, which is outside the stated dependency range
node_modules/cookie

path-to-regexp  <0.1.10
Severity: high
path-to-regexp outputs backtracking regular expressions - GHSA-9wv6-86v2-598j
fix available via `npm audit fix --force`
Will install express@4.21.1, which is outside the stated dependency range
node_modules/path-to-regexp

send  <0.19.0
Severity: moderate
send vulnerable to template injection that can lead to XSS - GHSA-m6fv-jmcg-4jfg
fix available via `npm audit fix --force`
Will install express@4.21.1, which is outside the stated dependency range
node_modules/send
  serve-static  <=1.16.0
  Depends on vulnerable versions of send
  node_modules/serve-static

6 vulnerabilities (1 low, 2 moderate, 3 high)

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Co-authored-by: tomoya.kita <tomoya.kita@linecorp.com>

Author: D-ske104