Bump filepath bound to allow 1.4.300 #311

Job	Run time
build (macos-latest, lts-12.26, bytestring-0.11.3.0, filepath-1.4.100.0, unix-2.8.0.0)	11m 48s
build (macos-latest, lts-22.7, bytestring-0.11.5.3, filepath-1.5.2.0, os-string-2.0.2, unix-2.8.5...	14m 15s
build (ubuntu-latest, 8.4.4, 3.0.0.0, before_prepare() { sed -i.bak /utimensat/d configure.ac; })	4m 19s
build (ubuntu-latest, 8.6.5, 3.0.0.0, before_prepare() { sed -i.bak /utimensat/d configure.ac; })	4m 46s
build (ubuntu-latest, 8.10.7, 3.8.1.0)	4m 33s
build (ubuntu-latest, 9.0.2, 3.8.1.0)	4m 55s
build (ubuntu-latest, 9.2.4, 3.8.1.0)	3m 49s
build (ubuntu-latest, 9.4.3, 3.8.1.0)	4m 15s
build (ubuntu-latest, latest, latest)	1m 53s
build (windows-latest, lts-12.26, bytestring-0.11.3.0, filepath-1.4.100.0, time-1.8.0.2, Win32-2....	8m 39s
build (windows-latest, lts-17.5, bytestring-0.11.3.0, filepath-1.4.100.0, time-1.9.3, Win32-2.13....	11m 20s
build (windows-latest, lts-22.7, bytestring-0.11.5.3, filepath-1.5.2.0, os-string-2.0.2, time-1.1...	7m 52s
	1h 22m 24s

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