fix: #204 Fix quotation in LICENSE.md and Bug in the #199

[swsoyee]

I'm so sorry about submit two unrelated commits in one PR (forgetting to switch the branch)

In 1a9d63f , Just update the quotation in license file.
Ref: http://www.apache.org/licenses/LICENSE-2.0

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In d289a0b , Fix the problem cause be evalFun()

When I using the dev version to reproduce the demo in #153, the bar seems to be drawn from the index 1.

df <- data.frame(
  x = factor(c(1, 2)),
  y = c(1, 5),
  upper = c(1.1, 5.3),
  lower = c(0.8, 4.6)
)

df %>%
  e_charts(x) %>%
  e_bar(y)

I have check the options before and after evalFun() conversion, it seems the results are identical. I can not figure out where is the problem but after d289a0b the bug have been solved.