lib: rename da.ts to d.ts

It now deals with both `@da` and `@dr`, so should be named accordingly,
similar to r.ts.

Author: Fang-

src/da.ts src/d.tssrc/da.ts renamed to src/d.ts

@@ -6,7 +6,7 @@ export { render, scot, rend } from './render';  //TODO  expose encodeString() ?
 
 //  atom utils
 
-import { toUnix, fromUnix, fromSeconds, toSeconds } from './da';
+import { toUnix, fromUnix, fromSeconds, toSeconds } from './d';
 export const da = { toUnix, fromUnix };
 export const dr = { toSeconds, fromSeconds };
 

src/index.ts

@@ -7,7 +7,7 @@
 
 import { aura, dime, coin } from './types';
 
-import { parseDa, parseDr } from './da';
+import { parseDa, parseDr } from './d';
 import { parseValidP, regexP } from './p';
 import { parseValidQ } from './q';
 import { parseR, precision } from './r';

src/parse.ts

@@ -7,7 +7,7 @@
 
 import { aura, coin } from './types';
 
-import { renderDa, renderDr } from './da';
+import { renderDa, renderDr } from './d';
 import { renderP } from './p';
 import { renderQ } from './q';
 import { renderR } from './r';