Update cherry-picked tests to current Squeak version of FileSystem

Classes were not renamed and there is no constructor without delimiter:.

Ref #3

Author: j4yk

src/FS-Tests-Core.package/FSPathTest.class/instance/testRelativeFromString.st

@@ -3,7 +3,7 @@ testRelativeFromString
 
 	| path |
 
-	path := Path from: 'plonk/griffle'.
+	path := FSPath from: 'plonk/griffle' delimiter: $/.
 
 	self assert: path isRelative.
 	self assert: path size equals: 2.

src/FS-Tests-Core.package/FSPathTest.class/instance/testRelativeFromStringNormalization.st

@@ -3,7 +3,7 @@ testRelativeFromStringNormalization
 
 	| path |
 
-	path := Path from: 'plonk/../griffle'.
+	path := FSPath from: 'plonk/../griffle' delimiter: $/.
 
 	self assert: path isRelative.
 	self assert: path size equals: 1.

src/FS-Tests-Core.package/FSPathTest.class/instance/testRelativeFromStringNormalizationParent.st

@@ -3,7 +3,7 @@ testRelativeFromStringNormalizationParent
 
 	| path |
 
-	path := Path from: 'plonk/../../griffle'.
+	path := FSPath from: 'plonk/../../griffle' delimiter: $/.
 
 	self assert: path isRelative.
 	self assert: path size equals: 2.

src/FS-Tests-Core.package/FSPathTest.class/instance/testRelativeFromStringParent.st

@@ -3,7 +3,7 @@ testRelativeFromStringParent
 
 	| path |
 
-	path := Path from: '../..'.
+	path := FSPath from: '../..' delimiter: $/.
 
 	self assert: path isRelative.
 	self assert: path size equals: 2.

src/FS-Tests-Core.package/FSPathTest.class/methodProperties.json

@@ -30,10 +30,10 @@
 		"testParseTrailingSlash" : "CamilloBruni 1/19/2012 15:00",
 		"testPrintRelativeWithParent" : "cwp 3/29/2011 16:46",
 		"testPrintWithDelimiter" : "cwp 2/26/2011 11:00",
-		"testRelativeFromString" : "CamilloBruni 2/14/2014 14:39",
-		"testRelativeFromStringNormalization" : "CamilloBruni 2/14/2014 14:41",
-		"testRelativeFromStringNormalizationParent" : "CamilloBruni 2/14/2014 14:41",
-		"testRelativeFromStringParent" : "CamilloBruni 2/14/2014 14:41",
+		"testRelativeFromString" : "jr 1/9/2021 16:13",
+		"testRelativeFromStringNormalization" : "jr 1/9/2021 16:13",
+		"testRelativeFromStringNormalizationParent" : "jr 1/9/2021 16:13",
+		"testRelativeFromStringParent" : "jr 1/9/2021 16:13",
 		"testRelativePrintString" : "cwp 2/27/2011 09:31",
 		"testRelativeTo" : "StephaneDucasse 2/18/2011 21:55",
 		"testRelativeToBranch" : "cwp 11/15/2009 00:21",