feat: move babel optional presets and plugins into peerDependencies

package.json

@@ -62,10 +62,8 @@
 		"typescript": "^3.7.2"
 	},
 	"dependencies": {
-		"@babel/core": "^7.7.2",
-		"@babel/plugin-transform-runtime": "^7.6.2",
-		"@babel/preset-env": "^7.7.1",
-		"@babel/runtime": "^7.7.2",
+		"@babel/core": "^7.6.4",
+		"@babel/runtime": "^7.6.3",
 		"@types/mkdirp": "^0.5.2",
 		"@types/node": "^12.12.7",
 		"@types/resolve": "0.0.8",
@@ -82,9 +80,19 @@
 		"tslib": "^1.10.0"
 	},
 	"peerDependencies": {
+		"@babel/preset-env": "^7.6.3",
+		"@babel/plugin-transform-runtime": "^7.6.2",
 		"typescript": "^3.x",
 		"rollup": "^1.26.3"
 	},
+	"peerDependenciesMeta": {
+		"@babel/preset-env": {
+			"optional": true
+		},
+		"@babel/plugin-transform-runtime": {
+			"optional": true
+		}
+	},
 	"main": "./dist/cjs/index.js",
 	"module": "./dist/esm/index.js",
 	"browser": "./dist/esm/index.js",