update modules

node_modules/terser/README.md

@@ -90,10 +90,9 @@ a double dash to prevent input files being used as option arguments:
                                 `reserved`  List of names that should not be mangled.
     --mangle-props [options]    Mangle properties/specify mangler options:
                                 `builtins`  Mangle property names that overlaps
-                                            with standard JavaScript globals.
+                                            with standard JavaScript globals and DOM
+                                            API props.
                                 `debug`  Add debug prefix and suffix.
-                                `domprops`  Mangle property names that overlaps
-                                            with DOM properties.
                                 `keep_quoted`  Only mangle unquoted properties, quoted
                                                properties are automatically reserved.
                                                `strict` disables quoted properties
@@ -133,7 +132,7 @@ a double dash to prevent input files being used as option arguments:
                                 sequences.
     --config-file <file>        Read `minify()` options from JSON file.
     -d, --define <expr>[=value] Global definitions.
-    --ecma <version>            Specify ECMAScript release: 5, 6, 7 or 8.
+    --ecma <version>            Specify ECMAScript release: 5, 2015, 2016, etc.
     -e, --enclose [arg[:value]] Embed output in a big function with configurable
                                 arguments and values.
     --ie8                       Support non-standard Internet Explorer 8.
@@ -321,12 +320,8 @@ $ terser example.js -c passes=2 -m --mangle-props regex=/_$/,reserved=[bar_]
 var x={o:3,t:1,calc:function(){return this.t+this.o},bar_:2};console.log(x.calc());
 ```
 
-In order for this to be of any use, we avoid mangling standard JS names by
-default (`--mangle-props builtins` to override).
-
-A default exclusion file is provided in `tools/domprops.js` which should
-cover most standard JS and DOM properties defined in various browsers.  Pass
-`--mangle-props domprops` to disable this feature.
+In order for this to be of any use, we avoid mangling standard JS names and DOM
+API properties by default (`--mangle-props builtins` to override).
 
 A regular expression can be used to define which property names should be
 mangled.  For example, `--mangle-props regex=/^_/` will only mangle property
@@ -534,7 +529,7 @@ if (result.error) throw result.error;
 
 ## Minify options
 
-- `ecma` (default `undefined`) - pass `5`, `2015`, `2016` or `2017` to override `parse`,
+- `ecma` (default `undefined`) - pass `5`, `2015`, `2016`, etc to override `parse`,
   `compress` and `output`'s `ecma` options.
 
 - `warnings` (default `false`) — pass `true` to return compressor warnings
@@ -611,7 +606,7 @@ if (result.error) throw result.error;
     sourceMap: {
         // source map options
     },
-    ecma: 5, // specify one of: 5, 2015, 2016, 2017 or 2018
+    ecma: 5, // specify one of: 5, 2015, 2016, etc.
     keep_classnames: false,
     keep_fnames: false,
     ie8: false,
@@ -686,6 +681,10 @@ If you happen to need the source map as a raw object, set `sourceMap.asObject` t
 
 ## Compress options
 
+- `defaults` (default: `true`) -- Pass `false` to disable most default
+  enabled `compress` transforms. Useful when you only want to enable a few
+  `compress` options while disabling the rest.
+
 - `arrows` (default: `true`) -- Class and object literal methods are converted
   will also be converted to arrow expressions if the resultant code is shorter:
   `m(){return x}` becomes `m:()=>x`. To do this to regular ES5 functions which
@@ -715,10 +714,6 @@ If you happen to need the source map as a raw object, set `sourceMap.asObject` t
 
 - `dead_code` (default: `true`) -- remove unreachable code
 
-- `defaults` (default: `true`) -- Pass `false` to disable most default
-  enabled `compress` transforms. Useful when you only want to enable a few
-  `compress` options while disabling the rest.
-
 - `directives` (default: `true`) -- remove redundant or non-standard directives
 
 - `drop_console` (default: `false`) -- Pass `true` to discard calls to
@@ -865,6 +860,9 @@ If you happen to need the source map as a raw object, set `sourceMap.asObject` t
 - `unsafe_math` (default: `false`) -- optimize numerical expressions like
   `2 * x * 3` into `6 * x`, which may give imprecise floating point results.
 
+- `unsafe_symbols` (default: `false`) -- removes keys from native Symbol 
+  declarations, e.g `Symbol("kDog")` becomes `Symbol()`.
+
 - `unsafe_methods` (default: false) -- Converts `{ m: function(){} }` to
   `{ m(){} }`. `ecma` must be set to `6` or greater to enable this transform.
   If `unsafe_methods` is a RegExp then key/value pairs with keys matching the
@@ -1318,6 +1316,8 @@ To allow for better optimizations, the compiler makes various assumptions:
 - Object properties can be added, removed and modified (not prevented with
   `Object.defineProperty()`, `Object.defineProperties()`, `Object.freeze()`,
   `Object.preventExtensions()` or `Object.seal()`).
+- `document.all` is not `== null`
+- Assigning properties to a class doesn't have side effects and does not throw.
 
 ### Build Tools and Adaptors using Terser