refactor(vectors): update mem mapped type handling

BREAKING CHANGE: buffer mapping fns use new type string consts

- part of umbrella-wide changes to thi.ng/api Type aliases (see a333d41)

packages/vectors/src/buffer.ts

@@ -4,7 +4,6 @@ import {
     Type,
     typedArray,
     TypedArrayTypeMap,
-    TYPEDARRAY_CTORS,
 } from "@thi.ng/api";
 import type { ReadonlyVec, Vec, VecOpSV, VectorConstructor } from "./api";
 
@@ -15,11 +14,11 @@ import type { ReadonlyVec, Vec, VecOpSV, VectorConstructor } from "./api";
  * and `byteStride` the number of bytes between resulting vectors
  * (defaults to `size * SIZEOF[type]`). It's user's responsibility to
  * ensure these two values are compatible with the chosen array type
- * (i.e. for `Type.F32`, these MUST be multiples of 4).
+ * (i.e. for `"f32"`, these MUST be multiples of 4).
  *
  * @example
  * ```ts
- * mapBuffer(Type.F32, new ArrayBuffer(32), 4, 2)
+ * mapBuffer("f32", new ArrayBuffer(32), 4, 2)
  * // [
  * //   Float32Array [ 0, 0 ],
  * //   Float32Array [ 0, 0 ],
@@ -44,9 +43,8 @@ export const mapBuffer = <T extends Type>(
     byteStride = size * SIZEOF[type]
 ) => {
     const res: TypedArrayTypeMap[T][] = [];
-    const ctor = TYPEDARRAY_CTORS[type];
     for (; --num >= 0; byteOffset += byteStride) {
-        res.push(<any>new ctor(buf, byteOffset, size));
+        res.push(typedArray(type, buf, byteOffset, size));
     }
     return res;
 };