Update espeak to commit e7e59f9 (#7846)
* Update eSpeak-ng to 1.49.3-dev
eSpeak-ng submodule is now at: 8a61f0d2108df289d713e0d74273dbfebbf23776
* Don't delete emoji files for espeak
espeak no longer freezes with emoji files present in the known cases, so
reintroduce them. This undoes the mitigation in #7810.
* eSpeak synthDriver: provide text to eSpeak as utf8 as otherwise adjacent emojis will not be combined.
* Update to latest eSpeak master. This addresses the pronunciation of words like return and selected. as espeak-ng/espeak-ng@223ff9c has been reverted.
* Upgrade to latest eSpeak master
* Update eSpeak to latest master. Most notably some improvements to Russian.
* Update espeak to latest master. Fixes #8231
* Update eSpeak to latest master
* Update to latest eSpeak master
* Minhook sconscript: correct case of hde source files as newer windows 10 builds seem to now be case-sensitive.
* Upgrade to latest espeak master
* Update What's new and readme.
