convert webpack config composer to be Typescript

[zenz34]

convert webpack config to be Typescript

----------------------------|---------|----------|---------|---------|-------------------

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	100	100	100	100
concat-method.ts	100	100	100	100
constants.ts	100	100	100	100
delete-custom-props.ts	100	100	100	100
head-concat-array-merge.ts	100	100	100	100
index.ts	100	100	100	100
partial.ts	100	100	100	100
profile.ts	100	100	100	100
tail-concat-array-merge.ts	100	100	100	100
----------------------------	---------	----------	---------	---------	-------------------

=============================== Coverage summary ===============================
Statements : 100% ( 152/152 )
Branches : 100% ( 87/87 )
Functions : 100% ( 47/47 )
Lines : 100% ( 147/147 )

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[jchip]

unit test for xarc-webpack failed

Error: src/index.ts(295,24): error TS2351: This expression is not constructable.
  Type 'typeof import("/home/runner/work/electrode/electrode/packages/xarc-webpack/node_modules/.f/_/webpack-config-composer/1.1.3-fynlocal_h/webpack-config-composer/dist/index")' has no construct signatures.