doc: add migration paths

doc/api/deprecations.md

@@ -1005,7 +1005,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isBoolean()`][] API is deprecated.
+The [`util.isBoolean()`][] API is deprecated. Please use
+`typeof arg === 'boolean'` instead.
 
 ### DEP0046: `util.isBuffer()`
 
@@ -1052,7 +1053,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isDate()`][] API is deprecated.
+The [`util.isDate()`][] API is deprecated. Please use
+`arg instanceof Date` instead.
 
 ### DEP0048: `util.isError()`
 
@@ -1075,7 +1077,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isError()`][] API is deprecated.
+The [`util.isError()`][] API is deprecated. Please use
+`arg instanceof Error` instead.
 
 ### DEP0049: `util.isFunction()`
 
@@ -1098,7 +1101,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isFunction()`][] API is deprecated.
+The [`util.isFunction()`][] API is deprecated. Please use
+`typeof arg === 'function'` instead.
 
 ### DEP0050: `util.isNull()`
 
@@ -1121,7 +1125,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isNull()`][] API is deprecated.
+The [`util.isNull()`][] API is deprecated. Please use
+`arg === null` instead.
 
 ### DEP0051: `util.isNullOrUndefined()`
 
@@ -1144,7 +1149,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isNullOrUndefined()`][] API is deprecated.
+The [`util.isNullOrUndefined()`][] API is deprecated. Please use
+`arg === null || arg === undefined` instead.
 
 ### DEP0052: `util.isNumber()`
 
@@ -1167,7 +1173,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isNumber()`][] API is deprecated.
+The [`util.isNumber()`][] API is deprecated. Please use
+`typeof arg === 'number'` instead.
 
 ### DEP0053: `util.isObject()`
 
@@ -1190,7 +1197,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isObject()`][] API is deprecated.
+The [`util.isObject()`][] API is deprecated. Please use
+`typeof arg === 'object'` instead.
 
 ### DEP0054: `util.isPrimitive()`
 
@@ -1213,7 +1221,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isPrimitive()`][] API is deprecated.
+The [`util.isPrimitive()`][] API is deprecated. Please use
+`typeof arg !== 'object' && typeof arg !== 'function'` instead.
 
 ### DEP0055: `util.isRegExp()`
 
@@ -1236,7 +1245,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isRegExp()`][] API is deprecated.
+The [`util.isRegExp()`][] API is deprecated. Please use
+`arg instanceof RegExp` instead.
 
 ### DEP0056: `util.isString()`
 
@@ -1259,7 +1269,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isString()`][] API is deprecated.
+The [`util.isString()`][] API is deprecated. Please use
+`typeof arg === 'string'` instead.
 
 ### DEP0057: `util.isSymbol()`
 
@@ -1282,7 +1293,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isSymbol()`][] API is deprecated.
+The [`util.isSymbol()`][] API is deprecated. Please use
+`typeof arg === 'symbol'` instead.
 
 ### DEP0058: `util.isUndefined()`
 
@@ -1305,7 +1317,8 @@ changes:
 
 Type: Runtime
 
-The [`util.isUndefined()`][] API is deprecated.
+The [`util.isUndefined()`][] API is deprecated. Please use
+`arg === undefined` instead.
 
 ### DEP0059: `util.log()`
 
@@ -1324,7 +1337,8 @@ changes:
 
 Type: Runtime
 
-The [`util.log()`][] API is deprecated.
+The [`util.log()`][] API is deprecated. Please use a userland
+alternative instead.
 
 ### DEP0060: `util._extend()`
 
@@ -1343,7 +1357,8 @@ changes:
 
 Type: Runtime
 
-The [`util._extend()`][] API is deprecated.
+The [`util._extend()`][] API is deprecated. Please use a userland
+alternative instead.
 
 ### DEP0061: `fs.SyncWriteStream`