The `sample_ohlcv` dataset added in #262 is lazy-loaded (`LazyData: true`), which makes `R CMD check` on r-universe / CRAN warn:
```
* checking data for ASCII and uncompressed saves ... WARNING
Warning: package needs dependence on R (>= 2.10)
```
Lazy-loading of package data requires R ≥ 2.10, so the package must declare it. This adds `Depends: R (>= 2.10)` to `bindings/r/DESCRIPTION`.
**Verified locally** (R 4.6.0, `R CMD build` + `R CMD check`): the `checking data for ASCII and uncompressed saves` step now reports **OK**. (The repo CI only runs `R CMD INSTALL` + testthat, not full `R CMD check`, so this surfaces only on r-universe — same asymmetry as the golden-test skip.)
kingchenc
fb9c39d4cd