Fix gcc10 compat

scripts/emoji_codegen.py

@@ -15,7 +15,7 @@ class Emoji(object):
 def generate_qml_list(**kwargs):
     entrycount = sum([len(c[1]) for c in kwargs.items()])
     tmpl = Template('''
-constexpr std::array<Emoji, {{ entrycount }} > emoji::Provider::emoji = {
+constexpr const std::array<Emoji, {{ entrycount }} > emoji::Provider::emoji = {
     {%- for c in kwargs.items() %}
     // {{ c[0].capitalize() }}
     {%- for e in c[1] %}

src/emoji/Provider.cpp

@@ -16,7 +16,7 @@ null_literal(const char16_t (&lit)[N])
     return std::u16string_view(lit, N);
 }
 
-constexpr std::array<Emoji, 3681> emoji::Provider::emoji = {
+constexpr const std::array<Emoji, 3681> emoji::Provider::emoji = {
   // People
   Emoji{null_literal(u"\U0001F600"),
         null_literal(u"grinning"),