[kvdb-web] enable tests on macOS

[ordian]

Once rustwasm/wasm-pack#717 is resolved.

[zrzka]

The problem is in the --chrome flag (chromedriver). Incompatible driver is installed. Works fine with just --firefox.

I always ended up with installing my own chromedriver. It's also suggested in this comment.

(Permanent) Workaround for Travis CI (or even local macOS):

install:
  - curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.1/install.sh | sh
  - source ~/.nvm/nvm.sh
  - nvm install v10.5
  - npm install -g chromedriver

Chrome:

zrzka@Roberts-MacBook-Pro kvdb-web % wasm-pack test --headless --chrome
...
Running headless tests in Chrome on `http://127.0.0.1:56954/`
Try find `webdriver.json` for configure browser's capabilities:
Not found
running 1 test

test indexed_db::reopen_the_database_with_more_columns ... ok

test result: ok. 1 passed; 0 failed; 0 ignored
console.log div contained:
    Upgrading or creating the database to version None, columns 1
    Previous version: 1, columns 0
    Upgrading or creating the database to version Some(2), columns 3
    Previous version: 2, columns 2

zrzka@Roberts-MacBook-Pro kvdb-web %

Firefox (works fine without this workaround):

zrzka@Roberts-MacBook-Pro kvdb-web % wasm-pack test --headless --firefox
...
Running headless tests in Firefox on `http://127.0.0.1:59468/`
Try find `webdriver.json` for configure browser's capabilities:
Not found
running 1 test

test indexed_db::reopen_the_database_with_more_columns ... ok

test result: ok. 1 passed; 0 failed; 0 ignored
console.log div contained:
    Upgrading or creating the database to version None, columns 1
    Previous version: 1, columns 0
    Upgrading or creating the database to version Some(2), columns 3
    Previous version: 2, columns 2

zrzka@Roberts-MacBook-Pro kvdb-web %

[ordian]

@zrzka thanks for the analysis, I'll submit a PR with the suggested workaround.