feat: treat token parameter as optional

[nogic1008]

close #66

[commit-lint]

Features

• set token param as optional (231ca6e)
• get token parameter as optional (710f67f)

Doc

• treat token param as optional in README (2832299)
• treat token param as optional in README-ja (14570f7)

Bug Fixes

• add indent (58252b2)

Contributors

@nogic1008

[codecov]

Codecov Report

Merging #67 into master will not change coverage by %.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #67   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines           60        60           
  Branches         9         9           
=========================================
  Hits            60        60           

Impacted Files	Coverage Δ
src/input-helper.ts	100.00% <ø> (ø)

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