fix: export date adapters as es modules to enable tree shaking

Fixes #1283
Fixes #1331
Fixes #1292

Author: mattlewis92

package-lock.json

@@ -9,11 +9,11 @@
     "start": "node --max_old_space_size=8192 ./node_modules/.bin/ng serve --open",
     "build:copy-package-json": "copyfiles package.json projects/angular-calendar & copyfiles package.json projects/angular-calendar/schematics/ng-add",
     "build:lib": "ng build angular-calendar --prod",
-    "build:date-adapters": "tsc -p tsconfig-date-adapters.json",
+    "build:date-adapters": "tsc -p tsconfig-date-adapters.json && tsc -p tsconfig-date-adapters.json --module es2015 --outDir ./dist/angular-calendar/date-adapters/esm",
     "build:styles": "node-sass projects/angular-calendar/src/angular-calendar.scss | postcss --output dist/angular-calendar/css/angular-calendar.css",
     "build:clean": "del-cli dist",
     "build:schematics": "tsc projects/angular-calendar/schematics/ng-add/index.ts",
-    "build:copyfiles": "copyfiles CHANGELOG.md README.md LICENSE dist/angular-calendar & cp-cli projects/angular-calendar/util/date-adapter-package.json dist/angular-calendar/date-adapters/date-fns/package.json & cp-cli projects/angular-calendar/util/date-adapter-package.json dist/angular-calendar/date-adapters/moment/package.json & copyfiles -u 3 projects/angular-calendar/src/**/*.scss dist/angular-calendar/scss & npx copyfiles -u 2 \"projects/angular-calendar/schematics/**/*.{json,js}\" dist/angular-calendar",
+    "build:copyfiles": "copyfiles CHANGELOG.md README.md LICENSE dist/angular-calendar & cp-cli projects/angular-calendar/util/date-adapter-package-date-fns.json dist/angular-calendar/date-adapters/date-fns/package.json & cp-cli projects/angular-calendar/util/date-adapter-package-moment.json dist/angular-calendar/date-adapters/moment/package.json & copyfiles -u 3 projects/angular-calendar/src/**/*.scss dist/angular-calendar/scss & npx copyfiles -u 2 \"projects/angular-calendar/schematics/**/*.{json,js}\" dist/angular-calendar",
     "build": "run-s build:copy-package-json build:lib build:date-adapters build:styles build:schematics build:copyfiles",
     "test:single": "cross-env TZ=UTC ng test angular-calendar --watch=false --code-coverage",
     "test:watch": "cross-env TZ=UTC ng test angular-calendar",
@@ -157,7 +157,7 @@
     "@scarf/scarf": "^1.0.5",
     "angular-draggable-droppable": "^4.4.6",
     "angular-resizable-element": "^3.3.2",
-    "calendar-utils": "^0.8.0",
+    "calendar-utils": "^0.8.2",
     "positioning": "^2.0.1",
     "tslib": "^1.13.0"
   },

package.json

@@ -0,0 +1,5 @@
+{
+  "main": "./index.js",
+  "module": "../esm/date-fns/index.js",
+  "typings": "./index.d.ts"
+}

projects/angular-calendar/util/date-adapter-package-date-fns.json

@@ -1,4 +1,5 @@
 {
   "main": "./index.js",
+  "module": "../esm/moment/index.js",
   "typings": "./index.d.ts"
 }