eslint fixes

[sghael]

Goal of the pull request:

• Fix eslint warning/errors

> eslint src/*.js


/Users/.../development/ebay-node-api/src/buildURL.js
  2:1  error  Expected line before comment  lines-around-comment
  8:5  error  Expected line before comment  lines-around-comment

/Users/.../development/ebay-node-api/src/findingApi.js
   24:8  warning  Unexpected console statement  no-console
   37:8  warning  Unexpected console statement  no-console
   58:8  warning  Unexpected console statement  no-console
   78:8  warning  Unexpected console statement  no-console
   88:8  warning  Unexpected console statement  no-console
  107:8  warning  Unexpected console statement  no-console

/Users/.../development/ebay-node-api/src/merchandising.js
  20:9  warning  Unexpected console statement  no-console
  33:5  warning  Unexpected console statement  no-console
  37:9  warning  Unexpected console statement  no-console

/Users/.../development/ebay-node-api/src/request.js
   7:24  error  Unexpected function expression  prefer-arrow-callback
  47:24  error  Unexpected function expression  prefer-arrow-callback

/Users/.../development/ebay-node-api/src/shopping.js
  14:8  warning  Unexpected console statement  no-console
  28:8  warning  Unexpected console statement  no-console
  40:8  warning  Unexpected console statement  no-console
  57:8  warning  Unexpected console statement  no-console

✖ 17 problems (4 errors, 13 warnings)
  4 errors and 0 warnings potentially fixable with the `--fix` option.

Description

[pajaydev]

@sghael Thanks 👍