feat(route): provides namespace.any for better readability

[chentsulin]

After: (use any as event type)

function App() {
  return router([	
    messenger.any(HandleMessenger),
    line.any(HandleLine),
    slack.any(HandleSlack),
    telegram.any(HandleTelegram),
    viber.any(HandleViber),
    whatsapp.any(HandleWhatsapp),
  ]);
}

Before:

function App() {
  return router([	
    messenger(HandleMessenger),
    line(HandleLine),
    slack(HandleSlack),
    telegram(HandleTelegram),
    viber(HandleViber),
    whatsapp(HandleWhatsapp),
  ]);
}

[codecov-io]

Codecov Report

Merging #719 into release/1.4 will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           release/1.4     #719      +/-   ##
===============================================
+ Coverage        80.82%   80.85%   +0.02%     
===============================================
  Files              108      108              
  Lines             4491     4497       +6     
  Branches          1078     1078              
===============================================
+ Hits              3630     3636       +6     
  Misses             815      815              
  Partials            46       46              

Impacted Files	Coverage Δ
packages/bottender/src/line/routes.ts	100.00% <100.00%> (ø)
packages/bottender/src/messenger/routes.ts	100.00% <100.00%> (ø)
packages/bottender/src/slack/routes.ts	100.00% <100.00%> (ø)
packages/bottender/src/telegram/routes.ts	100.00% <100.00%> (ø)
packages/bottender/src/viber/routes.ts	100.00% <100.00%> (ø)
packages/bottender/src/whatsapp/routes.ts	100.00% <100.00%> (ø)

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