add some NEWS.md updates

NEWS.md

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 StartUpDG.jl follows the interpretation of [semantic versioning (semver)](https://julialang.github.io/Pkg.jl/dev/compatibility/#Version-specifier-format-1) used in the Julia ecosystem. Recent changes will be documented in this file for human readability.
 
+## Changes when updating to v1.0.0
+
+Most of the major changes are tracked in this [PR](https://github.com/jlchan/StartUpDG.jl/pull/160). Some descriptions of other changes are listed below. 
+
+#### Added
+
+* Generation of cut-cell meshes using `Subtriangulation` quadrature by default, which ensures positive quadrature weights. The old behavior is retained by specifying a `MomentFitting` quadrature type. 
+
+#### Changed
+
+* `NamedArrayPartition` was moved to RecursiveArrayTools.jl. 
+* The required Julia version was increased to v1.10. This was to make StartUpDG.jl compatibility with RecursiveArrayTools.jl (see above).
+* Removed SimpleUnpack.jl as a dependency. Loading StartUpDG.jl will no longer reexport `@unpack`, since destructuring via `(; propertyname) = x` is supported natively in Julia 1.7 and up.
+* Updated to NodesAndModes v1, which changed the ordering of triangle nodes to make them consistent with tet node ordering. 
+* We introduced a `MultidimensionalQuadrature` type. All `Polynomial` approximation types now utilize either `MultidimensionalQuadrature` or `TensorProductQuadrature` as a type parameter. The previous type parameter `DefaultPolynomialType` is now simply used to determine the default quadrature type parameter. Note that this is internal behavior and should not impact standard usage of StartUpDG.jl.
+
+
 ## Changes when updating to v0.17
 
 #### Added