fix: typing errors with typescript 4.8

[dargmuesli]

Some typing does not seem to work fine with typescript 4.8.2: https://github.com/maevsi/stomper/runs/8039281506?check_suite_focus=true#step:5:174

#14 23.69 node_modules/camelcase-keys/index.d.ts(49,44): error TS2344: Type 'T[P]' does not satisfy the constraint 'readonly any[] | Record<string, any>'.
#14 23.69   Type 'T[keyof T]' is not assignable to type 'readonly any[] | Record<string, any>'.
#14 23.69     Type 'T[string] | T[number] | T[symbol]' is not assignable to type 'readonly any[] | Record<string, any>'.
#14 23.69       Type 'T[string]' is not assignable to type 'readonly any[] | Record<string, any>'.
#14 23.69         Type 'T[string]' is not assignable to type 'readonly any[]'.
#14 23.69           Type 'T[keyof T]' is not assignable to type 'readonly any[]'.
#14 23.69             Type 'T[P]' is not assignable to type 'readonly any[]'.
#14 23.69               Type 'T[keyof T]' is not assignable to type 'readonly any[]'.
#14 23.69                 Type 'T[string] | T[number] | T[symbol]' is not assignable to type 'readonly any[]'.
#14 23.69                   Type 'T[string]' is not assignable to type 'readonly any[]'.
#14 23.70 node_modules/camelcase-keys/index.d.ts(52,4): error TS2344: Type 'T[P]' does not satisfy the constraint 'readonly any[] | Record<string, any>'.

[sindresorhus]

// @Masa-Shin @g-plane

[Masa-Shin]

It seems that this occurs with even older versions of camelcase-keys (I don't know why). I will look into it.

[Masa-Shin]

PR: #98