Update NEWS.md

Author: remlapmot

NEWS.md

@@ -1,3 +1,15 @@
+# TwoSampleMR v0.7.5
+
+(Release date 2026-05-04)
+
+* Amend <https://gwas.mrcieu.ac.uk> URLs to <https://opengwas.io/>
+* Bump version of roxygen2 to 8.0.0 and regenerate documentation
+* Replace `array(1:nexp)` placeholder allocations with `numeric(nexp)`/`integer(nexp)` in multivariable MR functions
+* Replace `1:n` with `seq_len(n)` in loop indices across `singlesnp`, `leaveoneout`, `rucker`, `mr_mode`, and `multivariable_mr` for empty-vector safety
+* Pre-generate jackknife resample indices in `mr_rucker_jackknife_internal` and switch to `lapply`, matching the bootstrap function pattern
+* Vectorise `get_population_allele_frequency` by inlining the quadratic-root logic from `contingency()` and picking the valid root with vectorised constraint checks
+* Skip `mr_wald_ratio` inside `mr()` when more than one SNP is provided and other methods are also requested, suppressing the multi-SNP warning for default method runs while preserving the warning when `mr_wald_ratio` is requested on its own
+
 # TwoSampleMR v0.7.4
 
 (Release date 2026-04-02)